0 235 pc 302 1 parts catalog

0-235 Series

Parts Catalog

RARTs CATALGG

RC-30;R

AVCO LYCOI\IIINO

0-935 SERIE8

AIRCRAFT ENGINES

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PRICE ~18.00 JUNE 1982

~AVCO LYCOMING WILLIAMSPORT DIVISIOI\I

652 Oliver Street, Williamsport, Pennsylvania 17701

LYCOMING ENGINE GROUP

RECORD OF REVISIONS

0-235 Series

MFG REV

NO DESCRIPTION ISSUEDATE ATPREVDATE INSERTEDBY

Reissue 6/1 982 12/1211984 ATPNMR

A IPages 1-5, 1-6 211 984 4/111 987 ATP/AB

B IPages 2-13, 3-1, 3-2 111987 4/1/1987 ATP/AB

Change Notice 288 121911991 1/2011992 ATP/GM

RECORD OF TEMPORARY REVISIONS

ATP REV 1 INSERT II DATE I REV REMOVE

REV NO DESCRIPTION ISSUE DATE DATE BY II REMOVED I INCOR BY

L~AVCO LYCOMING WILLIAMSPORT DIVISION

652 Oliver Street, Williamsport,~7AVCO LYCOMING ENGINE GROUP

TECHNICAL

PUBLICATION REVISION

;mEYISION No. ENGINE MODEL PUBLICATION No. PUBLICATION DATE

PC-302B 0-235 SerFes PC-302 June, 1982

The page(s) furnished herewith are int~nded to replace the corresponding

pagels) of the publication indicated above.

Remove I Insert

June, 1982 January, 1987

2-13, 3-1, 3-2 2-13, 3-1, 3-2

~7AVCO LYCOMING VVILLIAMSPORT DIVISION

652 Oliver Street, Williamsport, Pennsylvania 17701

~AVCO LYCOMING ENGINE GROUP

TECHNICAL

PUBLICATION REVISION

REVISION No. ENGINE MODEL PUBLICATION No. PUBLICATION DATE

PC1302A 0-235 Seuies PC-302 June, 1982

The page(s) furnished herewith are intended to replace the corresponding

page(s) of the publication indicated above.

Remove Insert

PC-302A February, 1984

Page 1-5

Propeller flange bushingsclarification.

Page 1-6

Propeller flange bushingsadded.

nnl~:l Lyromlngmtllnnepert Ptemt 652 Oliver Street

.Textron LycominglSubsidiary of Textron Inc. Williamspoct, PA 17701 U.S.A.717/323-6181

Parts and Price Change Notification

CHANGE NOTICE: 288 December 9, 1991

MODELS AFFECTED:

0-235 8erias

CHANGE DESCRIPTION:

When it becomes necessary to replace all of the pistonp~n/piston pin plugs on all applicable 235 series

engines.

INTERCHANGEABILITY:

Use Instead of

LW-13445 Piston Pin 60827

LW-11625 Piston Pin Plug 60828

NOTE: Piston pin and piston pin plugs must be

installed in complete engine sets.

NOTE: 60827 piston pin will be maintained for a

limited time for individual replacement.

~ATVCO LYCONI I NG 0-235 SERIES PARTS CATALOG

INTRODUCTION

NOTE

This Parts Catalog supersedes PC-102 dated August, 1973 and PC-202 dated March, 1978.

This illustrated parts catalog contains a complete parts listing for the Avco Lycoming 0-235

series aircraft engines. For use in expediting of parts when ordering, the serial number and model

designation are stamped on the engine nameplate located on the oil sump.

The Group Assembly Section lists major assemblies and sub-assemblies in general sequence of

engine build-up. The "Quantity Per Assembly" column indicates the number required at that

particular location only and is not to be construed to mean quantity for the complete engine.When the symbol "un" is listed, it means to use quanitity as necessary.

The Service Kit Section provides listings for seal and gasket sets and cylinder, piston and ringassemblies for use in ordering parts as necessary during overhaul.

The Numerical Index is provided for convenience in finding parts when only the part number is

known.

j In the Oversize and Undersize Parts section, procurable oversize and undersize parts are listed

i preceding the main group assembly parts list.

Parts coverage of Vendor Accessories used on Avco Lycoming engines may be found in the ap-

propriate Vendor’s Parts Catalog. A list of the publications appear in the latest edition of Avco

Lycoming Service Letter No. L114.

SERVICE BULLETINS, INSTRUCTIONS AND LETTERS

Although the information contained in this parts catalog is up-to-date at time of publication,users are urged to keep abreast of later information through all Avco Lycoming distributors or

from the factory by subscription. Consult the latest edition of Service Letter No. L114 for

subscription information.

NOTE

The illustrations shown in this publication are typical of the subject matter they portray; in no

instance are they to be interpreted as examples of any specific engines, equipment or partthereof.

Any reference in this document to a supplierslparts manufacturers’ product, by name,

trademark, part number or other description is solely for the purposes of identification and does

not indicate or infer that Avco Lycoming accepts responsibility for quality control andlor airwor-

thiness of parts which do not pass through the Avco Lycoming quality control system.

C

~I/AVCO LYCOMING 0-235 SERIES PARTS CATALOG

0-235 SERIES

TABLE OF CONTENTS

SECTION PAGE

Introduction........._____

Table of Contents.........____,

Oversizeand Undersize Parts List.........._____ .........__ .iii

1. CRANKCASE, CRANKSHAFT AND CAMSHAFT GROUPCrankcase .1-1Oil Level Gage Assemblies.

................._ 1.3

Crankshaft, Camshaftand Related Parts.................._

CrankcaseRelated Parts. .1-7Crankshaft Idler Gears and Tachometer Drive.............. 1.9Crankcase Attaching Parts ~1-11

2. ACCESSORY HOUSING AND RELATED PARTS

Accessory HousingAssembly. ..2-1Oil Pump Assembly and Accessory Housing Attaching Parts............ 2.3Propeller Governor Oil Line............... 2.5Propeller Governor Drive and Cover ......2-7Fuel Pump Assembly and Attaching Parts 2-9Vacuum Pump’ Drive and Cover. ~2-11Oil Filter Assembly andOil Cooler Bypass Valve. .2-13

3. CYLINDER, PISTON AND VALVE TRAIN

Connecting Rod, Piston and Ring Assemblies

Cylinder Assembly 3-3Cylinder Related Parts ~3.5Valve AssemblyCylinder Head Drain Tubes and Intercylinder Cooling Baffles 3.9

4. IGNITION SYSTEM

Magnetos and Magneto Drives.

Magnetos and Magneto Drives .4-3Ignition Harness and Lead Assembly (Slick) 4.5Spark Plugs 4-7

5. ELECTRICAL COMPONENTS

Voltage Regulators, Relay, Alternator and Generator Drive Belts...... 5-1Generator Mountingand Attaching Parts

.........___ 5.3Alternator Mounting and Attaching Parts....... 5-5Generator and Alternator Assemblies...... 5~7Starter Motorand Attaching Parts........ 1 5~9

6. OIL SUMP AND INDUCTION SYSTEMOil Sump Assembly and Oil Suction Screen 6-1Intake Pipe Assembly.... 6-3Carburetor AYsembly..... ..6-5Priming System.......... 6~7

7. SERVICE KIT SECTIONSeal and Gasket Set........... 7-1Cylinder, Piston and Ring Assembly.... 7-2

8. NUMERICAL INDEX .8-1

~AVCO LYCOMING 0-235 SERIES PA´•RTS CATALOG

0-255 SERIES

Oversize and Undersize Parts Listing

PART NO. DESCRIPTION OVERSIZE UNDERSIZE

W5 P10 P15 P20 P30 M03 M06 M10

61681 GUIDE, Valve intake X X X X

LW-11626 GUIDE, Valve X X X X

66796 INSERT, Spark plug X

69796 DOWEL, Crankshaft bearing X

60814 BUSHING, Propeller flange X X X X

73757 BUSHING, Propeller flange X X X X

61258 SEAT, Intake valve (Alum Bronze) X X X

LW-11900 SEAT, Intake valve (steel) Allison X X X

LW-16800 SEAT, Intake valve (solid) X X X

60337 SEAT, Exhaust valve (solid) X X X

LW-16699 SEAT, Exhaust valve, Allison X X X

68763 BEARING, Crankshaft X X X

LW-1 3884 BEARING, Crankshaft, front X X X

61533 BEARING, Crankshaft, right front X X X

61520 BEARING, Crankshaft, left front X X X

69373 BEARING, Connector rod X X X

Studs available in P03, P07 and P12 oversize.

NOTE

When ordering oversize or undersize parts, be sure to specify the required oversize or undersize dimension

along with the proper part number. For example: to order bearing LW-13521 in .003 undersize, order part

number LW-13521-M3. Oversize code is "P" while undersize code letter is "M". These letters are then

followed by the numbers designating the size in thousandths of an inch.

~AVCO LYCOMING 0-235 SERIES PARTS CATALOG

CRANKCASE, CRANKSHAFT AND CAMSHAFT GROUP

CRANKCASE ASSEMBLY

N OUANTITY PER ASSEMBLYPART

REF. BESCRIPTION Alcle c c c F F H J K K K L M N NRUMBER 1 2 2 2 2 2 2 2 2 2 2 2 2L BCACABCAABCAC AC

1 78213* CRANKCASE ASSEMBLY 1 1 1

78214’" CRANKCASE ASSEMBLY 1 1 t 1 1

LW-11631’* CRANKCASE ASSEMBLY 1 1 1 1 1

LW-13257*’ CRANKCASE ASSEMBLY

LW-13282’* CRANKCASE ASSEMBLY 1 1 1 1 1

LW-16354*’ CRANKCASE ASSEMBLY 1

LW-18735*’ CRANKCASE ASSEMBLY 1

2 61182 STUD, 3/8-24 x 10-15/64 long 2 2 2 2 2 2

3 74124 STUD, 3/8-16 x 9-11/16 long 4 4 4 4 4 4

4 38-12 STUD, 3/8-16 x 1-1/2 long 24 124 124 124124 24

5 31C-12 STUD, 5/16-18 x 1-1/2 long 4

31C-12 STUD, 5/16-18 x 1-1/2 long 2

6 LW-11623 STUD, 7/16-20 x 10-7/16 long 2 2 2 2 2 2 2 2 2 2 2

7 LW-11622 STUD, 7/16-14 x 9-25/32 long 4 4 4 4 4 4 4 4 4 4 4

8 44-13 STUD, 7/16-14 x 1-5/8 long 8 8 8 8 8 8 8 8 8 8 8

9 38-13 STUD, 3/8-16 x 1-5/8 long 16116 161161161161161161 1611611610 310-13 STUD, 5/16-18 x 1-5/8 long 1

11 STD-557 DOWEL, 1/2 dia. x 19/32 long,hollow 2

12 ISTD-514 DOWEL, 5/16 dia. x1/2 long 2

13 169796 DOWEL, Crankshaft bearing 2

14 1102 PLUG, 1/8-27 NPT, Alien 4 4 4

1102 PLUG, 1/8-27 NPT, Alien 3

15 ISTD-1111 ELBOW, 3/4 pipe hose 900 1 1 1 1 1 1 1 1 1 1 1

16 161584 VALVE, Hydraulic 1

17 161531 GASKET, Hydraulic valve 1 1 1

18 161583 COVER ASSY., Hydraulic valve 1

19 LW-14260 SEAL, Oil 1

20 61227 LEVER, Hydraulic valve 1

21 ISTD-131 SCREW, 1/4-28 x 1.00 long,hex hd. dr. 1

22 ISTO-43 NUT, 1/4-28 Slotted shear 1

23 ISTD-68 PIN, Cotter, 1/16x1/21ong 1

24 ISTD-160 WASHER, 1/4 lock 2 2 2

25 STD-8 WASHER, 1/4 plain 2 2 2

26 STD-1875 BOLT, 1/4-20 x 13/16 long 2 2 2

27 61555 PLUG, Hydraulic valve hole 1 1

28 161554 COVER, Hydraulic valve hole plug 1 1 1

Used with controllable pitch propeller.Used with fixed pitch propeller.

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r~lAVCO I VCOMING 0-235 SERIES PARTS CATALOG


OIL LEVEL GAGE ASSEMBLIES

O OUANTITV PLR ASSLMRLYFIG. N

PART Alf´•IC C C C F F H J K K K L M N NRE~. DIESCRIPTION

2 2 2 2 2 2WUMBER 1 2 2 2 2 2 2 2

L Br;ACA9CAABCAC AC

2 L

1 75735 TUBE, Oil level gage, short 1 1 1 1 1 1 f

75767 TUBE, Oil level gage, intermediate 1 1

75736 TUBE, Oil level gage, long 1 1 1 1 1 1 1 1 1 1 1 1 1

2 LW-12789 TUBE ASSY., Oil level gage, 12-13/16

long

3 75767 TUBE, Oil level gage1

4 77527 EXTENSION, Oil filler 1

5 72220 GASKET, Oil level gage1

6 72059 GASKET, Oil level gage 1

7 74068 RING, Oil level gage seal 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

8 74065 RING, Oil level gage seal 1 1

9 72312 RING, Oil seal 1.00 ID x 1/8 section 1

10 162219 GAGE ASSY., Oil level 1 1 1 1 1 1 1

LW-14752 GAGE ASSY., Oil level 1 1 1 1 1 1 1 1 1 1 1 1 1 1

LW-14781 GAGE ASSY., Oil level 1 1

LW-14746 GAGE ASSY., Oil level 1

LW-14792 GAGE ASSY., Oil level 1 1

11 72842 PLUG, Oil level gage 1 1 1 1 1 1 1 1 1 1 1 1 111 1

72844 PLUG, Oil level gage 1 1

74314 PLUG, Oil level gage1

12 STD-406 DOWEL, 3/16 x 1/2 long 2

13 74217 RING, Oil level gage1

1-3

I VCOIVIING 0-235 SERIES PARTS CATALOG

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Figure 2. Oil Level Cage Assemblies

1-4

~IAVCO LYCOMING 0-235 SERIES PARTS CATALOG


CRANKSHAFT, CAMSHAFT AND RELATED PARTS

o OUARTITV PER ASSEMRLIFIG. W

PARTRf~. OESCRIPTIOW A C C C C C F F H J K K K L L M N N

WUMBLR 1 1 1 2 2 2 2 2 2 2 2 2 2 2 1 2 2L BCACABCAABCAC AC3 L

1 LW-12693* CRANKSHAFT ASSY. 1 1

LW-12699’’ CRANKSHAFT ASSY. 1 1

LW-12697*’ CRANKSHAFT ASSY. 1 1 1 1 1 1 1 1 1 1 1 1

LW-18697** CRANKSHAFT ASSY. 1

LW-12947’’ CRANKSHAFT ASSY. 1

2 STD-1211 PLUG, 2.00 dia. expansion 1

3 STD-1065 DOWEL. Stepped, 19/64 x 1/4 dia.

x 35/64 long 1

4 60814 BUSHING. Propeller flange 6 6

60814 BUSHING, Propeller flange 5

5 73757 BUSHING. Propeller flange 1

6 61510 PLUG, 1-3/4 OD 1 1 1

7 75706 CAMSHAFT ASSY. 1

8 61155 GEAR. Crankshaft 1

9 61156 LOCKPLATE, Crankshaft gear 1

10 iSTD-847 SCREW, 5/16-24 x 1.00 long 1

11 69340 SUPPORT ASSY.. Starter ring gear.

10/12 pitch, 1.91:1 drive 1 1

68942 SUPPORT ASSY., Starter ring gear.

10/12 pitch, 1.91:1 drive 1 1

76124 SUPPORT ASSY., Starter ring gear,

10/12 pitch, 1.91:1 drive 1


10/12 pitch. 3.25:1 drive 1 11


10/12 pitch, 3.25:1 drive 1 1 1 1 1 1

LW-13675 SUPPORT ASSY., Starter ring gear,

10/12 pitch, 3.25:1 drive 1 1 1 1 1 1 1


10/12 pitch, 3.25:1 drive 1 1


10/12 pitch. 3.25:1 drive 1

LW-18736 SUPPORT ASSY., Starter ring gear,12/14 pitch, 3.25:1 drive 1

I~ 60882 GEAR, Starter ring, 10/12 pitch 1

72566 GEAR, Starter ring. 12/14 pitch 1

STD-1214 SCREW, Truss head, 10-32 x 3/8 long 2 2 2


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CRANKCASE RELATED PARTS

o OUAISTITI PER ASSEMBLYFIO. N

PARTREF, DESCRIPTION A C C C C C F F H J K K K L L M N N

WUMBER L B C P. C 11 8 C A R B C R C A C11122222222222 22

4 L

1 1028-8 BALL, 11/16 dia. 1

2 61084 SPRING, Oil pressure relief valve 1

3 STD-425 WASHER, No. 10 plain (Max. 9) un

4 STD-1045 GASKET, 1-1/4 ID x 1-1/2 OD x 3/32

annular 1

5 76529 PLUG, Oil relief valve 1

6 77808 VALVE ASSY., Oil pressure relief,

adjustable 1

7 68763~ BEARING, Crankshaft 6 6 6

68763" BEARING, Crankshaft 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8

68763*’ BEARING, Crankshaft 4

8 61533’ BEARING, Crankshaft, right front 1 1 1

61520* BEARING, Crankshaft, left front 1 1 1

LW-13884*’ BEARING, Crankshaft, front 2

9 LW-13792 SML, Crankshaft oil 1

10 72091 RING, Oil seal, 23/64 ID x 7/64 dia.

section 8

72091 RING, Oil seal, 23/64 ID x 7/64 dia.

section 2 2 2 2 2

11 I LW-11632 RING, Oil seal, 7/16 ID x 5/64 dia.

section 6 6 6 6 6

12 171105 BODY, Tappet 8

13 171032 BUSHING. Engine support (1.00 inch

diameter mounting hole) 8 8 8 8 8 8 8 8 8 8

14 ISTD-619 WASHER, 17/32 ID x 1-3/4 OD x

5/32 inch thick 8 8 8 8 8 8 8 8 8 8


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Li’l~AVCO I VCONIING 0-235 SERILS PARTS CATALOG


CRANKSHAFT IDLER GEARS AND TACHOMETER SHAFT

O ODANTITY PER ASSEMRLVFIO. N

PARTREE. DESCRIPTION Ale c c c c F F H J K K K L L M N N

IUMBER LB C ii C P. R C A A R C A C A C

1122222222222 22

5 L

1 74996 GEAR ASSY., Crankshatt idler 2 2 2 2 2 2 2

2 77309 BUSHING, Crankshaft idler gear 2 2 2 2 2 2 2

3 74996 GEAR ASSY., Crankshatt idler 1 1 1 1 1 1 1 1 1 1 1 1 11

4 77309 BUSHING, Crankshaft idler gear 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

5 75072 GEAR ASSY., Crankshaft idler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

6 77309 BUSHING, Crankshaft idler gear 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

7 61151 SHAFT, Crankshaft idler gear 2

8 73817 LOCKPLATE, 1/4 bolt, 1-3/4 spacing 2

9 STD-705 BOLT, 1/4-20 x 11/16 long 4

10 75708 SHAFT ASSY., Tachometer 1

11 78368 PIN, 3/16 x 2-5/16 long 1

12 61544 PLUNGER, Fuel pump, long 1 1 1 1 1 1 i 1 1 1 1 1 1 1 1 1

13 45530 RING, Oil pump shaft retaining 1

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~I/AIVCO I VCOIVI I NG 0-235 SERIES PARTS CATALOG


CRANKCASE ATTACHING PARTS

o OUANTITV PER ~SSEMBLVFIG. IS

PARTK L M N NREF. DESCRIPTIOIS A C C C C C F F H J K K

WUMRER i 1 2 2 2 2 2 2 2 2 2 2 2 2 2L BCACABCAABCAC AC6 L

STD-1414 BOLT, 1/4-20 x 1-1/2 long 8

2:ISTD-8 WASHER, 1/4 plain 16

3 60803 STRAP, Lifting 1

4 STD-2084 BOLT, 1/4-20 x 1-3/4 long 1

5 AN6-21 BOLT, 3/8-24 x 2-13/64 long 1

6 STD-160 WASHER, 1/4lock 9

7 STD-1411 NUT, 1/4-20 plain 9

8 STD-1416 BOLT, 1/4-20 x1-1/2 long,dr. end 3

9 STD-8 WASHER, 1/4 plain (Max. 9) on

10 ISTD-1409 NUT, 1/4-20 Slotted shear 3

11 STD-33 WASHER, 3/8 plain 2

12 ISTD-872 NUT, 3/8-24 Slotted shear

13 AN6-34A BOLT, 3/8-24 x 3-19/32 long 2


15 STD-678 WASHER, 3/8 lock 2

16 STD-596 NUT. 3/8 plain 2

17 STD-1414 BOLT, 1/4-20 x 1-1/2 long 1 1

18 STD-1419 BOLT, 1/4-20 x 1-1/8 long 2 2

19 ISTD-8 WASHER, 1/4 Dlain 4 4

20 STD-160 WASHER, 1/4lock 3 3

21 STD-1411 NUT. 1/4-20 plain 1 1

1-11

L~CO LYCOMING 0-235 SERIES PARTS CATALOG

1-2-8-7~ 4-6-)7 3\ 1-2-6-7 ~-5-11-12

1-2-6-7

iro I:´•j

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Figure 6. Crankcase Attaching Parts

1-12

~VCO LYCO IVI I NG 0-235 SERIES PARTS CATALOG

ACCESSORY HOUSING AND RELATED PARTS

ACCESSORY HOUSING ASSEMBLY

O OUAWTITV PLR A~SEMBLYFIG. N

PARTRLF~. DESCRIPTIOW AICIC C C C F F H J K K K L M N N

WuMBEn L ,e n c R B P. Pl B C 4 A C

12222~22222 22

7L

1 73818 GASKET, Accessory housing 1

2 68796 HOUSING ASSY., Accessory 1 1

68798 HOUSING ASSY., Accessory 1 1

68800 HOUSING ASSY., Accessory 1

68802 HOUSING ASSY., Accessory 1 1 1 1




68790 HOUSING ASSY., Accessory 1 1 1

68792 HOUSING ASSY., Accessory 1 1 1 1 1 1 1 1 1 1 1


LW-12044 HOUSING ASSY., Accessory 1

LW-16011* HOUSING ASSY., Accessory 1 1 1

3 31C-12 STUD, 5/16-18 x 1-1/2 long 2 2 2 2 2 2 2 2 2 2 2 2 2 2 22

31C-12 STUD, 5/16-18 x 1-1/2 long 4

4 316-19 STUD, 5/16-18 x 2-3/8 long 2 2 2 2 2 2 2 2 2 2 2 2 2 2 22

310-19 STUD, 5/16-18 x 2-3/8 long 4 4 4

5 31CD-17 STUD, 5/16-18 x 2-1/8 long 3

6 256-22 STUD, 1/4-20 x 2-3/4 long 4

7 61400 STUD, 1/4-20 x 1-3/16 long 2

8 1102 PLUG, 1/8-27 NPT 2

9 STD-783 PLUG, 1/4-18 NPT f

10 STD-784 PLUG, 3/8-18 NPT 1

11 1 61175 ADAPTER, Tachometer 1

LW-16011 Housing provides for two impulse magnetos.

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I VCOIVIING 0-235 SLRIES PARTS CATALOG


OIL PUMP ASSEMBLY AND ACCESSORY HOUSING ATTACHING PARTS

o OUAWTITI PLR ASSEMBLIN

PARTRLF. DLSCRIPTIOW A C C C C C F F H J K K K i L M N N

i 22222222222 22IUMBLR L B C A C A B C a B C 4 C a C8 L

1 78531 BODV ASSY., Oil pump 1

2 LW-13775 IMPELLER ASSY., Oil pump driven 1

3 61174 SHAFT, Oil pump drive 1

4 60746 IMPELLER, Oil pump driving 1

5 LW-14260 SEAL, Tachometer drive, oil 1



8 STD-160 WASHER, 1/4lock 12

9 STD-1646 BOLT, 1/4-20 x 2.00 long 2 2 2 2 2 2 2 2 2 2 2 2 2 22

10 STD-1885 BOLT, 1/4-20 x 1-41/64 long 2 2 2

11 STD-1204 BOLT, 1/4-20 x 15/16 long 10

12 STD-1420 NUT, 5/16-18 Slotted 3

13 STD-1411 NUT, 1/4-20 plain 2

2-3

~CO LYCO IV1 I NG 0-235 SERIES PARTS CATALOG

-8-11

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2-4

,~iAVCO LYCOMING 0-235 SERIES PARTS CATALOG


PROPELLER GOVERNOR OIL I_INE

O OOANTITY PER ASSEMRLVFIO. N

PARTREF. DESCRIPTION AICIC C C F F H J K K K L L M N N

IUMBER LB C It C I R C A A A C A C A C

122222P22222 22

Q L

1 75167 TUBE ASSY., Prop. governor oil line 1

2 STD-1930 HOSE, 3/810 x 1.00 long 1

3 75165 CLIP, Prop. gov. oil line support 1


5 STD-475 WASHER, 5/16 lock, internal teeth

6 STD-1838 BOLT, 5/16-18 x 15/16 long, hex hd. 1

8 LW-16266-25-38 CLAMP 1

8 MS20822-6* ELBOW, 3/8 flared tube 1/4 NPT, 900 1

9 74070*’ ELBOW, 3/8 flared tube 9/16-18

str, thd., adj. 45"

Assemble in right crankcase, front,

Assemble in prop. governor adapter.

2-5

~ATVCO LYCnIV1IN r~ 0-235 SLRIES PARTS CATALOG

r-’-Ji .i~

ill

si

ii

2;e,i

o

i

.s 5

3

Figure 9. Propeller Governor Oil Line

2-6

II~AVCO LYCOMING 0-235 SERIES PARTS CATALOG


PROPELLER GOVERNOR DRIVE AND COVER

FIC. N OUANTITV PER ASSEMBLYPART

REF. DESCRIPTION Alcle c c c F F H J K K K L M N NNUMBER 2 2 2 2 2 2 2 2 2 2 2 2 2

10 LBCACARCAABCAC AC

68317 SHAFTGEAR, Prop. governor drive 1

2 71596 WASHER, Accessory driven gear 1

3 STD-1221 RING, 13/16 dia. x 3/64 thick,

internal retaining 1

4 68315 GASKET, Accessory drive adapter 1

5 75153 ADAPTER ASSY., Prop. governor drive 1

6 1102 PLUG, 1/8-27 NPT, Alien 1

7 67556 STUD, 5/16-18 x 2.00 long 4

8 STD-1774 PIN, 1/8x1/41ong 1


10 ISTD-475 WASHER, 5/16 internal lock 4

11 ISTD-1410 NUT, 5/16-18 plain 4

12 172053 GASKET, Governor 1

13 172378 COVER, Governor drive

14 iSTD-35* WASHER, 5/16 plain on

15 STD-475 WASHER, 5/16 internal lock 4

16 STD-1410 NUT, 5/16 plain 4

32 required for Woodward governor; 4 required for AN governor.

2-7

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L?I/AVCO LYCOMING 0-235 SERIES PARTS CATALOG


FUEL PUMP ASSEMBLY AND ATTACHING PARTS

FIC. N OUANTITV PLR ASSLMRLYPART

RLF. DESCRIPTIOR AIC C C C C F F H J K K K L L M N NWUMBER t 1 2 2 2 2 2 2 2 2 2 2 2 2 2L BCACABCAABCAC A C11 L

1 75246 FUEL PUMP, Low pressure, dual

diaphragm (6440295) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 12 60096 GASKET, Fuel pump 1 1 1 1 1 1 1 1 1 1 1 1 1 1113 STD-33 WASHER, 3/8 plain 2 2 2 2 2 2 2 2 2 2 2 2 2 2 224 STD-1882 SCREW, 3/8-16 x 1-9/32 long,

socket hd., dr. hd. 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 25 60096 GASKET, Fuel pump 1 1 1 1

6 65098 COVER, Fuel pump 1 1 1 1

7 STD-33 WASHER, 3/8 plain 2 2 2 28 LW-38-.75 BOLT, 3/8-16 x 3/4 long, hex hd. 2 2 2 29 STD-678 WASHER, Lock 2 2 2 2

2-9


kC)

1\

Crs

I~i,\;ip´•~,

/Ia",2-5

37 /1

Figure 11. Fuel Pump Assembly and Attaching Parts

2-10

O~ LYCr IF~IING 0-235 SLR(LS PARTS CATALOG


VACUUM PUMP DRIVE AND COVER

O OUBNTITV PER ASSEMBLIFIG. W

PARTREF. DESCRIPTIOW A C C C C C F F H J K K K L M N N

IUMBER L B rJ A C A B r. PI /i 8 C P. C A C

1 22222222222 22

12 L

1 61098 ADAPTER ASSY., Vacuum pump 1 1 1 1 1 1 i 1 1 1 1 1 1

2 STD-1774 PIN, 1/8 dia. x 1/4 long 1 1 1 1 1 1 1 1 1 1 1 1

3 STD-208 SEAL, Oil, 7/8 ID x 1-1/2 OD

x 5/16 wide 1 1 1 1 1 1 1 1 1 1 1 1 1

4 72970 GEAR ASSY., Vacuum pump driven 1 1 1 1 1 1 1 1 1 1 1 1

5 161183 GASKET, Accessory adapter 1

6 71596 WASHER, Accessory driven gear 1 1 1 1 1 1 1 1 1 1 1 1 1

7 8313 GASKET, Vacuum pump 1 1 1 1 1 1 1 1 1 1 1 1 1

8 60430 COVER, Vacuum pump 1


10 ISTD-1BO WASHER, 1/4lock 4

11 I STD-1411 NUT, 1/4-20 plain 4

12 168593 SPACER, Vacuum pump stud 4 4 4 4 4 4 4 4 4

2-11

i-~I/AVCO LYCOMING 0-235 SLRIES PARTS CATALOG

´•~Q´•

171

s c~

1,j3 iC/

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77Y,c:~I ,I

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11

~I12 -7i

o

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Figure 12. Vacuum Pump Drive and Cover

2-12

,´•~AVCO LYCOMING 0-235 SERIES PARTS CATALOG


OIL FILTER ASSEMBLY AND OIL COOLER BYPASS VALVE

O OUANTITY PER ASSEMBLYFIG. W

PARTREF. OESCRIPTIOW AICIC C C C F F H J K K K L M N N

WUMBER 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2L BCACARCAABCAC AC13 L

1 77853 HOUSING ASSY., Oil filter 1

2 77852 BASE ASSY., Oil filter 1 1 1 1 11

3 154[)19625 IOIL FILTER, Short, spin-on I I I I 1 I I I I 1 I I 1 1111111114 LW-12999 PLATE, Oil filter adapter 1 1 1 1 11

1(5 ILW-12795 IGASKET, Oil filter adapter i 1121 1 I II I rl i I 1 121212[2[26 75944 VALVE ASSY., Temp. control, oil cooler

bypass f 1 1 1 1 1 t 1 1 1 1 1 1 1 1 1

7 62817 SCREEN ASSY., Oil pressure 1 1 1 1 1 1 1 1 1 1 1 1 1 1

8 68974 HOUSING, Oil pressure screen 1 1 1 1 1 1

9 69510 HOUSING, Oil pressure screen 1 f i 1 1 1 1 f 1 1 1 1 1

10 61173 GASKET, Oil pressure housing 1 1 1 1 1 1 1 1 1 1 1 1 1 1

11 ISTD-294 GASKET, 7/8 x 5/8 ID x 3/32

annular 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

12 ISTD-111 GASKET, 1.00 ID x 1-1/4 OD x 3/32 1 1 1

13 25C-10 STUD, 1/4-20 x 1-1/4 1 1 1 1 f 1

14 ISTD-1350 PLUG, 1.00-14 so. hd. drilled 1 1 1

15 ISTD-8 WASHER, 1/4 plain 4

16 ISTD-1BO WASHER, 1/4 lock 1 1 1 1 1 1

17 ISTD-1856 SCREW, 1/4-20 x 1.00 hex hd.,

slotted 4 4 4 4 4 4 4 4 4 4 4 4 4 4

STD-1856 SCREW, 1/4-20 x 1.00 hex hd.,

slotted 3 3 3 3 3 3

18 ISTD-1411 NUT, 1/4-20 plain 1 1 1 1 1 1

19 69436^ SPRING, Oil cooler bypass 1 1 1 1

20 162415^ PLUNGER, Oil cooler bypass 1 1 1 1

21 ISTD-294 GASKET, 7/8 x 5/8 ID x 3/32

annular 1 1 f 1 1 1 1 1 1 1 1 1 1 1 1

22 62417 PLUG, Oil cooler bypass 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

23 ISTD-784 PLUG, 3/8 NPT 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2

24 AN816-8 NIPPLE, 1/2 flared tube, 3/8 NPT 2 2

25 AN777-8D ELBOW, Universal 750 1 1 1

26 IAN901-8A GASKET, Metal tube connection seal 1 1 1

27 71620 BOLT, Oil cooler fitting 1 1 1

28 71623 WASHER, Oil cooler fitting 1 1 1

Do not use spring and plunger on engines equipped with 75944 oil cooler bypass valve or engines without oil cooler Installotion.

Revised January, 1987 2-13

nl

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19

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6:~AVI=O LYCOMII\IG 0-235 SERIES PARTS CATALOG

CYLINDER, PISTON AND VALVE TRAIN

CONNECTING RODS, PISTONS AND RING ASSEMBLIES

FIG. N OUAWTITY PER ASSEMRLY

PARTREF. OLSCRIPTIOI Alcle c c c F F H J K K K L M N N

IUMBERL

1

B ii C a O C a a o c a c n C

~2222222221 27

14 L

t 78030 ROD ASSY., Connecting 4

2 LW-13923 BUSHING, Connecting rod, upper 4

3 78027 BOLT, Connecting rod 8

4 LW-12186 NUT, Connecting rod 8

5 69373 BEARING, Connecting rod 8

6 73851 PISTON, Low compression 4 4 4 4 4 4

LW-11621 PISTON, Compression ratio 9.7:1 4 4 4

LW-13623 PISTON, Compression ratio 8.5:1 4 4 4 4 4 4 4 4

7 60827 PIN, Piston 4 4 4 4 4 4

LW-13445* PIN, Piston 4 4114 4 4 4 4 4 4 4 4 4

8 60828 PLUG, Piston pin 8 8 8 8 8 8

LW-11625 PLUG, Piston pin (piloted) 8 8 8 8 8 8 8 8 8 8 8 8

9 68196 RING, Piston, compression 8 8 8 8 8 8

78862 RING, Piston, compression 8 8 8 8 8 8 8 8 8 8 8

10 ILW-16867 RING, Piston, oil regulating 4 4 4 4 4 4

78864 RING, Piston, oil regulating,expander type 4 4 4 4 4 4 4 4 4 4 4

11 60072 RING, Piston, scraper (plain) 4 4 4 4 4 4

Used with piloted plug P/N LW-11625.

Revised January, 1987 3-1

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LYCOMING 0-235 SERIES PARTS CATALOG


CYLINDER ASSEMBLY

FIG. R QUA~TITY PER ASSEMBLYPART

REF. DESCRIPTIO# Alcle c c c F F H J K K K M N NWUMBER 1 2 2 2 2 2 2 2 2 2 2 2 2

15 LBCACABCAABC C AC

1 71828 CYLINDER 8 HEAD ASSY.,Plain 4 4 4 4 4 4

LW-11633 CYLINDER 8 HEAD ASSY., Nitrided 4 4 4 4 4 4 4 4 4LW-12986 CYLINDER 8 HEAD ASSY., Plain 4 4 4

LW-18290* CYLINDER 8 HEAD ASSY., Nitrided 4 4LW-16701* CYLINDER HEAD ASSY., Plain 4 4 4 4 4 4LW-16703’ CYLINDER 8 HEAD ASSY., Nitrided 4 4 4 4 4 4 4 4 4LW-16704’ CYLINDER HEAD ASSY., Plain 4 4 4

2 61258 SEAT, Intake valve 4 4 4 4 4 4LW-11900 SEAT, Intake valve (steel) 4

3 60337 SEAT, Exhaust valve 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4LW-16699" SEAT, Exh;lust valve 4

4 61681 GUIDE, Valve, intake and exhaust 8 8 85 61681 GUIDE, Valve, intake 4 4 4 4 4 4 4 4 4 4 4 4 4 46 LW-11626 GUIDE, Valve, exhaust 4 4 4 4 4 4 4 4 4 4 4 4 4 47 66796 INSERT, Spark plug, 18-1.5 MM 88 31C-12 STUD, 5/16-18 x 1-1/2 long 8

9 STD-700 ELBOW, 90", 3/8 flared tube 4

Incorpontes Allison exhaust valve seats.

Allison valve seat.

3-3


j/

´•´•~´•I

.e.b~45

Figure 15. Cylinder Assembly

~iAVCO LYCOMING 0-235 SERIES PARTS CATALOG


CYLINDER RELATED PARTS

O OUA#TITY PLR ASSEMRLVN

PART C C C C C F F H J K K K L L M N NRE~. DESCRIPTIOI A

2 2 2 2 2RUMRLR 1 1 2 2 2 2 2 2 2 2

L BCACABCAABCAC AC

16 L

1 73806 ROD ASSY., Push 8

2 60831 ROCKER ASSY., Valve 8

3 60398 BUSHING, Valve rocker 8

4 73807 SCREW, Valve adjusting 8

5 STD-587 NUT, 9/16-18 x 5/32 thick 8

6 LW-13790 SHAFT, Valve rocker 4

7 LW-12892 THRUST BUTTON, Rocker shaft 8

8 75906 GASKET, Rocker box 4

9 61247 COVER, Rocker box 4

10 ISTO-1925 SCREW, 1/4-20 x 5/8, self-locking 24

11 1383-8 NUT, 3/8-24 plain 32132132 32

383-8 NUT, 3/8-24 plain 16116 16116116116116116116(16116

12 ISTD-2106 NUT, 7/16-20 plain 16116 16116116116/16116116116116

13 162869 RING, Oil seal, 3/32 dia. x 4-3/8 4

14 65321 GASKET. Exhaust flange 4

77611 GASKET, Exhaust flange 4

15 61260 FLANGE, Exhaust, stainless 4 4 4 4 4 4 4 4 4 4 44 4

61259 FLANGE, Exhaust, carbon 4


17 STD-475 WASHER, 5/16 lock, internal teeth 8

18 STD-1410 NUT, 5/16-18 plain 8

3-5

2593

13

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1

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1~7 O

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On

r~IAVCO LYCOiV1 I 1\1G 0-235 SERIES PARTS CATALOG


VALVE ASSEMBLY

o OURNTITI PER ASSEMRLIFIG. N

PARTC F F H J K K L M N NREE. DESCRIPTION Alcle cc

NUMBER 2 2 2 2 2 2 2 2 2 2 2 2 2L BCACABCAABCAC AC17 L

1 60037 VALVE, Intake 4 4 4 4 4 4

LW-11901 VALVE, Intake 4 4 4 4 4 4 4 4 4 44

2 66531 VALVE, Exhaust 4 4 4 4 4 4

LW-11634 VALVE, Exhaust 4 4 4 4 4 4 4 4 4 4 4 4 4

3 61252 SEAT, Valve spring, outer 8

4 LW-13320 SEAT, Valve spring, inner 8

5 LW-10077 SEAT, Valve spring 8

6 LW-11795 SPRING, Valve, auxiliary 8

7 LW-11800 SPRING, Valve, outer 8

8 60903 TUBE, Push rod shroud 8

9 LW-18661 SEAL, Shroud tube 16

10 60009 KEY, Valve 16

3-7

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1

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la:~´•29 m/i~////,i ii I/´•

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CYLINDER HEAD DRAIN TUBES AND INTERCYLINDER COOLING BAFFLES

FIG. IJ OUANTITY PER ASSEMRLY

PARTREF. DESCRIPTIOIS A C C C C C F F H J K K K L M N N

NUMBER 1 2 2 2 2 2 2 2 2 2 2 2 1 2 2

18 LBCACABCAABCAC AC

1 60890 TUBE ASSY., Oil drain, cyl. no. 1 1

2 60821 TUBE ASSY., Oil drain, cyl. no. 2 i

3 60928 TUBE ASSY., Oil drain, cyls. no. 3 4 2

4 STD-2180 HOSE, 3/8 ID x 1-13/16 4

5 STD-684 NIPPLE, Straight, 3/8 ID hose 4

6 LW-1 5592-5-05 CLAMP, Hose 8

7 LW-13304 BAFFLE ASSY., Intercylinder 2 2 2 2 2 2 22

8 71611 RETAINER, Intercylinder baffle 2 2 2 2 2 2 22

9 LW-13303 HOOK, Intercylinder baffle retainer 2 2 2 2 2 2 2210 65614 PLUG, Baffle attaching 4 4 4

11 ISTD-251 WASHER, No. 10 lock 444

12 ISTD-665 SCREW, No. 10-32 x 3/4 fill, hd, dr. 4 44

3-9

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I~I/IAVCO LYCOMING 0-235 SERIES PARTS CATALOG

IGNITION SYSTEM

MAGNETOS AND MAGNETO DRIVES

FIG. N OUANTITV PER ASSEMBLYPART

REE. DESCRIPTIOW AICIC C c c F F H J K K K M N N#UMBER 1 2 2 2 2 2 2 2 2 2 2 2 2 2


1 LW-51 360-29 MAGNETO, S4LN-20 1 1 1 1 1 1LW-51360-37 MAGNETO, Impulse coupling, S4LN-21 1 1 1 1

LW-51360-54 MAGNETO, Impulse coupling, S4LN-21 1 1 1 1LW-51360-58 MAGNETO, Impulse coupling, S4LN-21 1LW-163045-8 MAGNETO, S4LN-204 1LW-163045-3 MAGNETO, S4LN-204 1

LW-163005-2 MAGNETO, Retard breaker, S4LN-200 1

LW-349305-1 MAGNETO, S4LN-1209 1 1

LW-349365-3 MAGNETO, S4LN-1227 1

LW-349365-9 MAGNETO, S4LN-1227 12 61665 GEAR, Magneto, impulse coupling 1 1 1 1 1 1 1 1 13 72495 GEAR, Magneto, retard breaker 1

4 61163 GEAR, Magneto 1 1 1 1 1 1 1 1 1 1 15 LW-12706 ADAPTER, Magneto, impulse coupling 1 1 1 1 1 1 1 1 16 62224 GASKET, Magneto adapter and magneto 3 2 3 3 1 3 3 1 3 3 37 STD-1727 WASHER, Plain, 3/4 OD x 21/64 ID x

1/8 thick 4 4 4 4 4 4 4 4 48 STD-475 WASHER, 5/16 lock, internalteeth 4 4 4 4 4 4 4 4 4 4 49 STD-1410 NUT, 5/16-18 plain 4 4 4 4 4 4 4 4 4 4 4

10 75965 CLAMP, Magneto 4 411 LW-1 2681 GASKET, Magneto 2 212 LW-52305-1 KIT ASSY., Magneto ground terminal 2 2 2 2 2 2 2

LW-157209 KIT ASSY., Magneto ground terminal 2

13 LW-157208 KIT ASSY., Magneto ground terminal 1

4-1

I-~AVCO LYCOn~ I NG 0-235 SERIES PARTS CATALOG

’’i

I

~nc, yi

OU~ 2_1\

~ic~ijli

:g~IiC//\I !Jr

?iI PL3 r.ii1D -c,kx;ii

o"\\

T.13-4

n~

I

6

~I

7:Z2-138

17

ie~i´•

Figure 19. Magnetos and Magneto Drives

4-2

~AVCO LYCON1I i~G 0-235 SERIES PARTS CATALOG

IGNITION SYSTEM

MAGNETOS AND MAGNETO DRIVES

o QUANTITV PER ~SSEMBLIFIC. N

PARTREF. DLSCRIPTION AICIF: C C C F F H J K K K L L M N N

22222222221 22IUIBER L R A C A B C A A B C 4 C n C20 L

1 LW-15635 MAGNETO HARNESS ASSY., Right

(Slick) 1 1 1 1 1

2 LW-15636 MAGNETO, Right (Slick Model 4250) 1 1 1 1 1

3 77743 HARNESS ASSY., Ignition, right 1 1 1 1 1


(Slick) 1

5 LW-15636 MAGNETO, Right (Slick Model 4250) 1

6 LW-15866 HARNESS ASSY., Ignition, right 1


(Slick) 1 i

8 LW-16595 MAGNETO, Right (Slick Model 4281,

impulse coupling) 1 1

9 77743 HARNESS ASSY., Ignition, right 1 1


(Slick) 1

11 ILW-16594 MAGNETO, Right (Slick Model 4252,

impulse coupling) 1

12 77743 HARNESS ASSY., Ignition, right 1

13 LW-15637 MAGNETO HARNESS ASSY., Left

(Slick) 1 1 1

14 LW-15638 MAGNETO, Left (Slick Model 4251,

impulse coupling) 1 1 1

15 77745 HARNESS ASSY., Ignition, left 1 1 1

16 ILW-16587 MAGNETO HARNESS ASSY., Left

(Slick) 1 1



18 77745 HARNESS ASSY., Ignition, left 1 1


(Slick) 1


impulse coupling) 1

21 LW-15868 HARNESS ASSY., Ignition, left 1


(Slick) 1 1

23 ILW-16595 MAGNETO, Left (Slick Model 4281,


24 77745 HARNESS ASSY., Ignition, left 1 1

25 61665 GEAR, Magneto, impulse coupling 1 1 1 1 1

61665 GEAR, Magneto, impulse coupling 2 2 2

26 61163 GEAR, Magneto 1 1 1 1 1

27 LW-12706 ADAPTER. Magneto, impulse coupling 1 1 1 1 1

LW-12706 ADAPTER, Magneto, impulse coupling 2 2 2

28 162224 GASKET, Magneto adapter and magneto 1 1 1 1 1

62224 GASKET, Magneto adapter and magneto 2 2 2

4-3

L~iAVCO LYCOMING 0-235 SERIES PARTS CATALOG

IGNITION SYSTEM

MAGNETOS AND MAGNETO DRIVES (Cont.)

O OUANTITY PER ASSEMBLYN

PART C C C F F H J K K K L M N NREF. DIESCRIPTION AIcle

NUMBLR 1 2 2 2 2 2 2 2 2 2 2 2 2L Br,ACABCAABCAC AC

20 L

29 LW-1 2681 GASKET, Magneto 2 2 2 2 2 2

30 76961 CLAMP, Magneto 4 4 4 4 4 4

31 LW-14057 CLIP. 1 wire 2 2 2 2 2 2

LW-14057 CLIP. 1 wire 4

32 LW-14060 CLIP. 2 wire 3 3 3 3 3 3

33 STD-475 WASHER. 5/161ock, internal teeth 4 4 4 4 4 4

34 ISTD-1727 WASHER, Plain, 3/4 OD x 21/64 ID

x 1/8 thick 4 4 4 4 4 4

35 STD-1410 NUT, 5/16-18 plain 4 4 4 4 4 4

36 STD-761 COTTER PIN, 3/32 dia. x 1.00 long 1 1 1 1

STD-761 COTTER PIN, 3/32 dia. x 1.00 long 2 2 2

i"’i

i, \r

i

13-14-16-1 7-19-20-22-23

5-1 8-21-24 ii IRQ:

;I, e.~..,.c´•

/OQ 28

ji

i

26

P/ ’28

\-1-2-4-9-7-8-11’-11

36-9-12

14-19-1’2-19-

20-22-23a 34130’7 ’~?e"733

c.Q 8

~29

1-2-4-5-7-8-10-1 7-1 9-20

Figure 20. Magnetos and Magneto Drives

4-4

Ir~l/AVCO LYCOMING 0-235 SERIES P~RTS GATALOG

IGNITION SYSTEM

IGNITION HARNESS AND LEAD ASSEMBLY (SLICK)

IFIG. N OUANTITY PER ASSEMBLYPART

REF. DESCRIPTION AIC C C C C F F H J K K K N NNDMBER 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2


1 LW-M-2403 HARNESS ASSY., Left magneto (Slick) 1 1 1 1 1 1 1 1 1

LW-M-2415 HARNESS ASSY., Left magneto (Slick) 1 1

LW-M-2404 HARNESS ASSY., Right magneto (Slick) 1 1 1 1 1 1 1 1

LW-M-2416 HARNESS ASSY., Right magneto (Slick) 1 1

2 LW-M-2375 PLATE, Spark plug cable 2 2 2 2 2 2 2 2 2 2 2

3 LW-14060 CLIP, Two wire for 1/4 screw 3 3 3 3 2 3 3 2 3 3 34 LW-14057 CLIP, One wire for 1/4 screw 2 2

5 71909 CLAMP, 1-1/2 ID (Offset) 4 4 4 4 4 4 4 4 4

6 LW-16266-25-50 CLAMP 1 1 1 1 1 1 1 1 1 17 STD-8 WASHER, 1/4 plain 1 1 1 1 8 1 8 1 18 STD-1BO WASHER, 1/4 lock, internalteeth 2 2 2 2 2 2 2 2 29 STD-696 WASHER, 1/4 plain on un

10 IAN500-416-12 SCREW, 1/4-20 x 3/4 long, fill, hd. 1 1 1 1 1 1 1 1 1

11 IAN500A-416-10 SCREW, 1/4-20 x 5/8 long 1 1 1 1 1 1 1 112 ISTD-553 SCREW, 6/32 x1/2 long, rd. hd. 4 4 4 4 4 4 4 4 4

13 STD-1874 SCREW, 1/4-20 self-locking 4 4

14 ISTD-1411 NUT, 1/4-20 plain 1 1 1 1 1 1 1

15 IAN365-632A NUT, 6-32 self-locking 4 4 4 4 4 4 4 4 4

16 76734 ZIP STRAP 2 2 2 2 6 2 2 6 2 2 2

iM-1985-48 LEAD ASSY., Replacement top bottom

leads (LW-M-2403’& LW-M-2404

harnesses) unlun un un union on unlun

1 M-1985-48 LEAD ASSY., Replacement top leads,

except for 1T, 2T, (LW-M-2415LW-M-2416 harnesses) on on

lM-1985-72 LEAD ASSY., Replacement 1T, 2T leads

(LW-M-2415 LW-M-2416 harnesses) un un

176923-48870-63 LEAD ASSY., Repiacement, top and

bottom leads (78539 harness) onion un un un on

176923-72890-63 LEAD ASSY., Replacement, Nos. 1 2

top leads (78546 harness) on on

176923-48890-63 LEAD ASSY., Replacement, Nos. 3 4

top leads (78546 harness) un on

176923-48870-63 LEAD ASSY., Replacement, bottom leads

(78546 harness) un on

Replacement lead assemblies have spark plug terminal end assembled and are shipped with necessary pans to complete magneto endassembly after being cut to proper length.

4-5

,-~AVCO LYCOMII\IG 0-235 SERIES PARTS CATALOG

17

~t‘’´•:j

j

i

\\I’I :j I aj

c_

i I\´•\´•,‘´•U\I;Gu

a

a ~1210

80

7

P´•-B 1~

Figure 21. Ignition Harness and Lead Assembly (Slick)

4-6

(-~AVCO LYCOMING 0-235 SERIES PARTS CATALOG

IGNITION SYSTEM

SPARK PLUGS

FIG. N OUANTITY PER ASSEMBLYPART

REE. DESCRIPTIBN AICIC C c c F H J K K K I M N NWUMB~R 2 2 2 2 2 2 2 2 2 2 2 2

22 LBCAC BCAABCnC AC

1 1182-83 SPARK PLUG, (Champion REM-40E),

high compression, shielded 81 1 i I I I I I I I I I 18

1182-86 SPARK PLUG, (Champion EM-41E).low compression, shielded 8 8 8 8 8 8

1182-J3 SPARK PLUG. (Champion REM-38E).

high compression, shielded I I I I I j 1 )81 1 1 18 8 8 8 88

1182-87 SPARK PLUG, (Champion REM-37BY),extended electrode, shielded I i I I I I I I I I I I 1 18 8 8 8

1182-P3 SPARK PLUG. (AC-SR-86),resistor type, shielded I I I I I I 1 8 8 8 8 8

NOTE

The above spark plugs are those used in current production only; this list does not include additional spark plugs that are approved for use inthese engines. See latest edition of Service Instruction No. 1042 for complete listing of all approved spark plugs.

4-7

L~AVCO LYCOMING 0-235 SERIES PARTS CATALOG

C~AMP1OI;

Figure 22. Spark Plugs

4-8

L-~VCO LYCOIVI I NG 0-235 SERILS PARTS CATALOG

ELECTRICAL COMPONENTS

VOLTAGE REGULATORS, RELAY, ALTERNATOR AND GENERATOR DRIVE BELTS

O OUANTITY PLR ASSLMBLYFIG. N

PARTREF. DESCRIPTIOW Alcle c c c F F H J K K K L M N N

22222222222 22IUMBLR L R A C A D C PI A B C 4 C A C23 L

1 72205 REGULATOR. Voltage (12V 20 Amp.) 1 1 1

833 REGULATOR, Voltage (12V 35 Amp.) 1 1 1

71745 REGULATOR, Voltage (12V 50 Amp.) 1 1

LW-10185 REGULATOR, Voltage, 12V, full transistor 1 1 1 1 1 1 1 1 1 1 1 111

LW-15895 REGULATOR, Voltage, 12V, transistorized 1 1 1

LW-10179 REGULATOR, Voltage, 24V, full transistor 1

2 78059 RELAY. Overvoltage, 12V 1 1 1 1 1 1 111

3 60886 BELT, Generator drive 1 1 1

4 76026 BELT, Alternator drive (3/8 wide) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11

5-1


iC~

3-4

i’

=i!I

I‘Y\\

X

´•I-

I"C~

Figure 23. Voltage Regulators, Alternator and Generator Drive Belts

5-2



GENERATOR MOUNTING AND ATTACHING PARTS

FIC. N ODANTITY PER ASSEMBLY

PARTREF. DESCRIPTION AIC C C C C F F H J K K K L M N N

NUMBER 1 2 2 2 2 2 2 2 2 2 2 2 2 2

24 L BCACPBCAIBCAC AC

1 69113 BRACKET, Generator (For 12V -20A) 1 1 1

2 69452 BRACKET, Generator (For 12V 35A

50A) 1 1 1

3 60733 SHIM, 11/32 ID x 1-1/8 OD x

.005 thick uniun un

4 STD-8 WASHER, 1/4 plain 1 1 1

5 STD-160 WASHER, 1/4 lock 3 3 3

6 STD-2084 BOLT, 1/4-20 x 1-3/4 long, hex. hd. 1 1 1

7 STD-1414 BOLT, 1/4-20 x 1-1/2 long, hex, hd. 1 1 1


9 STD-1411 NUT, 1/4-20 plain 1 1 1

10 76028 LINK, Generator adjusting 1 1 1

11 ISTD-35 WASHER, 5/16 plain 1 1 1

12 ILW-31H.75 BOLT, 5/16-18 x 3/4 long, hex. hd. dr. 2 2 2

13 STD-1727 WASHER, Plain, 3/4 OD x 11/32 ID

x 1/8 thick 1 1 1

1W ISTD-1834 BOLT, 5/16-18 x 1-1/16 long,hex. hd. dr. 1 1 1

5 STD-1835 BOLT, 5/16-18 x 1-23/64 long,hex. hd. dr. 1 1 1

6 STD-35 WASHER, 5/16 plain un iun on

7 STD-1420 NUT, 5/16-18 slotted 2 2 2

/8 STD-68 PIN, Cotter, 1/16 dia. x 1/2 long 2 2 2

9 69951 STRUT, Generator support 1 1 1

LW-31H.75 BOLT, 5/16-18 x 3/4 long, hex. hd. dr. 1 1 1

5-3


12

12

,I

i: .C Y

i, i 20

~is´•r

k´•!k/ :r/

´•_3.I´•-/z

ij

~C’

1-´•´•

I1 li7

ii’/7

54

jll L.-~i 17~18

Figure 24. (Senerator Mounting and Attaching Parts

5-4

~AVCO LYC(3MINIT 0-235 SERIES PARTS CATALOG

ELECTRIAL COMPONENTS

ALTERNATOR MOUNTING AND ATTACHING PARTS

N OUANTITY PER ASSEMBLYPART

REF. BESCRIPTION AICICIC C C F F H J K K K L M N NWUMBER 2 2 2 2 2 2 2 2 2 2 2 t 2 2

25 LBC;ACABCAABCAC AC

1 78158 BRACKET, Alternator 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

LW-13039 BRACKET, Alternator 1

2 73383 LOCKPLATE, 5/16 bolt x 1.00 spacing 1

3 STD-8 WASHER, 1/4 plain 1 1 1 1 1 1 1 1 1 1 1 1 1

4 STD-160 WASHER, 1/4 lock, internalteeth 3 3 3 3 3 3 3 3 3 3 3 3 3 3 35 STD-2084 BOLT, 1/4-20 x 1-3/4 long, hex. hd. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

6 STD-1215 BOLT, 1/4-20 x 1-1/4 long, hex. hd. 2 2 2 2 2 2 2 2 2 2 2 2 2 2 27 STD-1838 BOLT, 5/16-18 x 15/16 long, hex. hd. 2

8 STD-1411 NUT, 1/4-20 plain 1 1 1 1 1 1 1 1 1 1 1 1 1 1

9 75380 LINK, Alternator adjusting 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 110 ISTD-35 WASHER, 5/16 plain 1 1 f 1 1 1 1 1 1 1 1 1 1 1 1 1

11 LW-31H.75 BOLT, 5/16-18 x 3/4 long, hex, hd. dr. 1 1 1 1 1 1 1 1 1 1 1 1 1 t 1 1

12 STD-1727 WASHER, Plain, 3/4 OD x 11/32 ID x

1/8 thick 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

13 LW-31H.75 BOLT, 5/16-18 x 3/4 long, hex, hd. dr. 1 1 1 1 1 1 1 1 1 t 1 1 1 1 1 1

14 74323 STRUT, Alternator support 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 115 ILW-31H.75 BOLT, 5/16-18 x 3/4 long, hex. hd. dr. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

16 ISTD-690 WASHER, 13/16 OD x 3/8 ID x 1/16

thick 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 117 AN6-14 BOLT, 3/8-24 x 1-37/64 long, hex. hd.

dr, end 1 1 1 1 1 1 1 1 1 1 1 1 1 118 ISTD-690 WASHER, 13/16 OD x 3/8 ID x 1/16

thick unlunlunlunlunlunlunJunlunlunlunlunlunlunlunlun19 STD-872 NUT, 3/8-24 slotted 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

20 ISTD-713 PIN, Cotter, 3/32 dia. x 3/4 long 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 121 AN6-16 BOLT, 3/8-24 x 1-53/64 long, hex. hd.

dr. end 1 1 1

22 IAN6-13 BOLT, 3/8-24 x 1-7/16 long, hex, hd.

dr. end 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

23 76534 SHIM, 1-1/8 OD x 13/‘32 ID x 1/64

thick unlunlunlunlunlunlunlunlunlunlunlunlunlunlunlun24 ISTD-690 WASHER, 13/16 OD x 3/8 ID x 1/16

thick unlunlun unlunlunlunlunlunlunlunlunlunlunlun25 ISTD-872 NUT, 3/8-24 slotted 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

26 ISTD-713 PIN, Cotter, 3/32 dia. x 3/4 long 1 t 1 1 1 1 1 1 1 1 1 1 1 1 1


28 STD-1419 BOLT, 1/4-20 x 1-1/8 long, hex. hd. 2 2 229 ISTD-8 WASHER, 1/4 plain 4 4 430 STD-1BO WASHER, 1/4 shakeproof lock 3 3 331 ISTD-1411 NUT, 1/4-20 plain 1 1 132 LW-10729 LINK, Alternator adjusting 1 1 133 STD-35 WASHER, 5/16 plain 1 1 134 ISTD-1858 BOLT, 5/16-18 x 29/32 long, hex. hd. 1 1 135 ISTD-2084 BOLT, 1/4-20 x 1-3/4 long, hex. hd. 1 136 ISTD-1215 BOLT, 1/4-20 x1-1/4 long, hex. hd. 2 2

5-5

~L7AVCO LYCOMI~G 0-235 SERIES PARTS CATALOG


ALTERNATOR MOUNTING AND ATTACHING PARTS (Cont.)

0 OUANTITY PER ASSEMBLYFIC. N

PARTC C C C C F F H J K K K L L M N N

REF. DESCRIPTIOW ARUMBER L

i E 2 2 2 2 2 2 1 2 2 2 2 2

25 LACABCAABCAC A C


38 STD-160 WASHER, 1/4 shakeproof lock 3 3

39 STD-1411 NUT, 1/4-20 plain 1 1

"’?1011

i\

:i

i

i37

13

;i iI;Yz

\"I ’"i’

1~

rIs

15

8´•7

~I38

14

O8-31-

re-36

4-30

7-36-2&341’331

\Q

347 7 i2 "s~as 18

P 7

23I,2624 ’20

Figure 25. Alternator Mounting and Attaching Parts

5-6

LYCOI~1ING 0-235 SERIES PARTS CATALOG


GENERATOR AND ALTERNATOR ASSEMBLIES

o OUAWTITY PLRFIO. N

PARTREF. DESCRIPTION A C C C C C F F H J K K K i M N N

1 122222222222 22WUMBfR j B C A C A B C A R B C A C R C26 L

1 68767 GENERATOR, 12V 35A (1101900) 1 1 1

71744 GENERATOR, 12V 50A(1101915) 1 1

2 78401* ALTERNATOR, 12V -40A, externally

grounded (ALE-6406) 1 1 1

LW-14303* ALTEANATOR, 12V -40A, externally

grounded (ALE-6420) 1

LW-14301* ALTERNATOR, 12V 40A,externally

grounded (ALE-8420) 1 1

78308’ ALTERNATOR, 12V 40A,externally

grounded (ALE-8406) 1 1 1 1 1

LW-12832’ ALTERNATOR ASSY., 12V 60A,

internally grounded 1 1 1

LW-12739 STRAP, Alternator ground 1 1 1

LW-14319* ALTERNATOR, 24V -50A, externally

grounded (ALT-8421) 1

LW-14309" ALTERNATOR, i 2V 60A, externally

grounded (ALY-8420) 1 1 1 1 1

LW-14308" ALTERNATOR, 12V 60A, .less

thermocouples, externally grounded

(ALY-8420) 1 1 1 1 1 1 1 1 1 1 1 1 1 1

LW-14310^ ALTERNATOR, 12V -60A, externally

grounded (ALY-6420) 1 1 1

LW-12833* ALTERNATOR ASSY., 12V 60A,

internally grounded 1

LW-12739 STRAP, Alternator ground 1

LW-12834’ ALTERNATOR ASSY., 12V 60A,

internally grounded 1 1

LW-12739 STRAP, Alternator ground 1 1

LW-14316" ALTERNATOR, 12V 70A, less

thermocouples, externally grounded

(ALX-8421) 1

LW-14317* ALTERNATOR, 12V -70A, externally

grounded (ALX-8421) 1

LW-14324* ALTERNATOR, 24V 70A, less

thermocouples, externally groundedALU-8421) 1

3.25:1 Ratio.

5-7


d c

Figure 26. (;enerator and Alternator Assemblies

5-8



STARTER MOTOR AND ATTACHING PARTS

FIG. N OUAWTITY PER ASSEMBLYPART

REF. BESCRIPTIOW A C C C C C F F H J K K K L L M N NWUMBER 1 1 2 2 2 2 2 2 2 2 2 2 2 2 227 L

BCACABCAABCAC AC

1 76210 STARTER, 12 volt, 10/12 pitch pin/on(MZ-4204) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

69953 STARTER, 24 volt; 10/12 pitch pinion(1109669) 1 1

LW-16207 STARTER, 24 volt, 10/12 pitch pinion(MMU-4001) 1 1 1

LW-15571 STARTER, 12 volt, 12/14 pitch pinion(MZ-4222) 1



4 LW-31-1.09 BOLT, 5/16-18 x 1-3/32 long, hex. hd. 4

5 STD-2156 BOLT, 5/16-18 x 1-5/32 long, hex. hd. 16 STD-1410 NUT, 5/16-18 plain 37 LW-1 2083 SWITCH, Magnetic (SAZ-4201-E-1) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 18 LW-1 2085 SWITCH, Magnetic (SAZ-4401C-1) 1 1

5-9

,i~AVCO LYCOMII\IG 0-235 SERIES PARTS CATALOG

I\

jir

j I t ;Cc~i

~5 ~i

´•dii -s 3 C_C~

o

~L t;/

I’u~

\O

Cj ~h

a

3--/

Figure 27. Starter Motor and Attaching Parts

5-10


OIL SUMP AND INDUCTION SYSTEM

OIL SUMP ASSEMBLY AND OIL SUCTION SCREEN

O OUAISTITY PLR ASSEMBLYFIG. N

PART C C C F F H J K K K L L M N NREF. DESCRIQTIOW Alcle

2 2 2WUMRLR 1 2 2 2 2 2 2 2 2 22L BCACABCAABCAC AC

28 L

1 61374 SUMP ASSY., Oil f 1 1 1 1 1

62318 SUMP ASSY., Oil 1 1 1 1 1 1 1 1 1 11

2 61376 CONNECTION, I’ntake pipe, front 2

3 61377 CONNECTION, Intake pipe, rear 2

4. 25C-11 STUD, 1/4-20 x 1-3/8 long 4

5 STD-551 PLUG, 1/2-14 NPT, So. hd. 1

6 LW-13353 GASKET, Oil sump 1

7 STD-8 WASHER, 1/4 plain

8 STD-160 WASHER, 1/4lock, internal teeth 20

9 STD-1204 BOLT, 1/4-20 x 15/16 long, hex, hd: 18

10 STD-1411 NUT, 1/4-20 plain 14

11 60820 GASKET, Oil suction tube flange 1

12 61381 TUBE ASSY., Oil suction 1

13 ISTD-1227 WASHER, 1/4 plain, copper 2

14 ISTD-1433 BOLT, 1/4-20 x 1-1/2 long, hex. hd. 2

15 STD-8 WASHER, 1/4 plain (Max. 4) un

16 STD-1409 NUT, 1/4-20 slotted shear 2

17 ISTD-68 PIN, Cotter, 1/16x1/21ong 2

18 61378 SCREEN, Oil suction 1

19 ISTD-1045 GASKET, 1-1/4 ID x 1-1/2 OD x

3/32 annular 1

20 61358 PLUG, 1-1/2x1-1/4-12, hex. hd. 1

6-1

LYC~7N1(NG 0-235 SERIES PARTS CATALOG

B c-17

fe

13

15 ii

´•´•\i~I- 3

I

/-2

i bI A$ii 9518

Figure 28. Oil Sump Assembly and Oil Suction Screen

6-2

~iAVCO LYCOMINE 0-235 S´•ERIES PARTS CATALOG


INTAKE PIPE ASSEMBLY

O OUAWTITV PLR ASSEMBLVFIG. 1

PARTREF. OESCRIPTIOR AICICIC C C F F H J K K K L L M N N

WUMRLR 2 2 2 2 2 2 2 2 2 2 2 2 2

29L BCeCIBCnaBCAC A C

1 LW-16728 PIPE, Intake cyls. nos. 1 2 2

2 LW-16730 PIPE, Intake, cyl. no. 3 1

3 LW-16729 PIPE, Intake, cyl. no. 4 1

4 STD-1196 HOSE, 1-1/2 10 x 1-7/8 x

1-1/2 long 4

5 LW-1 5592-8-28 CLAMP, Hose 8

6 71973 GASKET, 2 bolt flange, 1-7/8 ID 4

7 74360 FLANGE, Intake pipe, upper 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4

LW-16731 FLANGE, Intake pipe, upper 4 4



10 STD-1215 BOLT, 1/4-20 x 1-1/4 long, hex, hd. 8

6-3


r´•fi

i iI´• ‘‘E’ol

lu111

jII

II i/

f

4_/\YZ/

Figure 29. Intake Pipe Assembly

6-4

r~AVCO LYCONIIN r= 0-235 SLRIES PARTS CATALOG


CARBURETOR ASSEMBLY

O OUANTITY PER ASSEMBLY

PART CCCCFFHJKKKLLMNNREF. DESCRIPTION AleNUMBER 1 1 2 2 2 2 2 2 2 2 2 2 2 1 2 2

L BCACABCAABCAC AC30 L

1 60592 KET, Carburetor 1

2 61547 CARBURETOR, Man/el-Schebler, MA-3A

(10-3103-1) 1 1 1 1 1

77939 CARBURETOR, Marvel-Schebler, MA-3PA

(10-4978-1) 1 1

77585 CARBURETOR, Marvel-Schebler, MA-3A

(10-4953) 1 1

LW-10619 CARBURETOR, Marvel-Schebler, MA-3PA

(10-5050) 1 1 1 1 1


(10-5126) 1 1 1


(10-5142) 1 1 1 1 1

LW-15496 CARBURETOR, Man/el-Schebler, MA-3A

(10-5199) 1 1 1

LW-1 6073 CARBURETOR, Marvel-Schebler, MA-3PA

(10-5220) 1 1 1 1


(10-5257) 1 1


(10-5267) 1 1


4 STD-160 WASHER, 1/4lock, internal teeth 4

5 STD-1411 NUT, 1/4-20 plain 4

6-5

O LYCO IV1 I 1\1G 0-235 SLRIES PARTS CATALOG

c/

r-l0)

~Ic,

C,

j-l c-iu-L ;-7

I I-I-j

1 i

o

u :.e

-I´•J"

Figure 30. Carburetor Assembly

6-6

~7AVCO LYCOMING 0-235 SERIES PARTS CATALOG


PRIMING SYSTEM

O OOANTITY PER ASSEMRLYFIO. N

PARTC C C C F F H J K K K L L M N N

REF. DESCRIPTION AICWUMBER 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2

L BCACABCAABCAC AC31 L

1 1102* PLUG, 1/8-27 NPT, Alien hd. 4

2 LW-12098-1-170 TUBE ASSY., Primer cylinders,nos. 1&2 2 2 2 2 2 2 2 2 2

3 LW-12098-1-116 TUBE ASSY., Primer cylinders,nos. 3&4 2 2 2 2 2 2 2 2 2

4 LW-12098-0-100 TUBE ASSY., Primer, intermediate 2 2 2 2 2 2 2 2 2

5 LW-16266-25-13 CLAMP 4 4 4 4 4 4 4 4 4

6 71909 CLAMP, 1-1/2 ID with 1/4 die. offset 4 4 4 4 4 4 4 4 4

7 STD-553 SCREW, No. 6-32 x 1/2 long, rd. hd. 4 4 4 4 4 4 4 4 4

8 AN365-632A NUT, No. 6-32, self-locking 4 4 4 4 4 4 4 4 4

9 STD-853 TEE, Union, 1/8 tube 3 3 3 3 3 3 3 3 3

10 74225 NIPPLE ASSY., Primer 4 4 4 4 4 4 4 4 4

Assemble in cylinder heads.

6-7

i vCO iV1I I\IG 0-235 SERIES PARTS CATALOG

‘‘I Jto

2 ~3

10

10

r7-8 4

49

Figure 31. Priming System

6-8

L~AVCO LYCOM I NG SERIES PARTS CATALOG

SECTION 7

SERVICE KIT SECTION

SEAL AND GASKET SET

0-235 SERIES

Part No. Part Name Qty.

61499-1 SEAL AND GASKET SET 1

STD-111 GASKET 1

STD-208 SEAL, Oil 1

STD-294 GASKET, Annular 2


8313 GASKET, Vac. pump 2

60096 GASKET, Fuel pump 1

60592 GASKET, Carb. 1

60820 GASKET, Oil suction tube Range 1

LW-18639 LOCKPLATE, Crankshaft gear 1

LW-14260 SEAL, Tech. shaft 1

61173 GASKET, Oil press, hsg. 1

61183 GASKET, Accy. adapter 1

61523 CONTAINER 1

61531 GASKET, Hydraulic valve 1

62224 GASKET, Mag. adapter 3

LW-18661 SEAL, Shroud tube 16

65321 GASKET, Exhaust Range 4

68315 GASKET, Accy. dr. adapter 1

LW-13353 GASKET, Oil sump 1

71973 GASKET, Intake Range 4

72053 GASKET, Gov. drive 1

72059 GASKET 1

72078 LOCKPLATE, Cam gear 2

72091 RING, Oil seal 8

73383 LOCKPLATE 1

73817 LOCKPLATE, Camshaft idler gear shaft 2

73818 GASKET, Accy. hsg. 1

74065 RING, Oil level gage seal 1


75906 GASKET, Rocker box cover 4

76940 SEAL, Crankshaft oil 1

LW-13792 SEAL, Crankshaft oil 1

LW-12681 GASKET, Mag. 2

LW-12795 GASKET 1

LW-11632 RING, Oil seal 6

62869 RING, Cyl. base 4

LW-12040 TOP OVERHAUL GASKET SET 1

62869 SEAL, Cylinder base 4


71973 GASKET, Intake, 2 bolt Range 4


7-1

rl~AVCO LYCC3M I NG 0-235 SERI~S PARTS CATALOG

SECTION 7

SERVICE KIT SECTION

CYLINDER, PISTON AND RING ASSY.

O-235-C1, -C1B, -C2A, -C2C, -H2C

Part No. Part Name &ty.

75805 CYLINDER, PISTON AND RING ASSY. 1

LW-16701 CYLINDER AND HEAD ASSY. 1

66429 VALVE, Intake 1

66531 VALVE, Exhaust 1

LW-13320 SEAT, Valve spring, inner spring 2

61252 SEAT, Valve spring, outer spring 2

LW-11800 SPRING, Valve, outer 2

LW-11795 SPRING, Valve, auxiliary 2

LW-10077 SEAT, Valve spring 2

60009 KEY, Valve 4

60831 ROCKER ASSY., Valve 2

LW-13790 SHAFT, Valve rocker 1

1102 PLUG,.125 pipe x .375 long (socket) 1


61247 COVER, Rocker box 1

STD-1925 SCREW,.250-20 x .63 long fill, head, self-locking 6

73807 SCREW, Valve adjusting 2

STD-587 NUT,.5625-18 x .16 thick 2

71195 BOX, Set-up 1

73851 PISTON 1

60827 PIN, Piston 1

60828 PLUG, Piston pin 2

LW-13672 RING, Piston, top compression 1

LW-13658 RING, Piston, scraper1

62869 RING, Oil seal (cylinder base) 1


LW-12892 BUTTON, Thrust 2

STD-1215 BOLT 2

73806 PUSH ROD ASSY. 2

LW-16867 RING, Oil regulator 1

7-2


SECTION 7SERVICE KIT SECTION


0-235-F2A,-F2B,-J2A


LW-12591 CYLINDER, PISTON AND RING ASSEMBLY 1STD-587 NUT, 9116-18 x 5/32 thick 2STD-1215 BOLT 2STD-1925 SCREW, 1/4-20 x 5/8 long, fill, hd. 61102 PLUG, 1/8 pipe x 3/8 long, socket 160009 KEY, Valve 4LW-13790 SHAFT, Valve rocker 160831 ROCKER ASSY., Valve 261247 COVER, Rocker box 1LW-13320 SEAT, Valve spring, inner 261252 SEAT, Valve spring, outer 262869 RING, Oil seal (cylinder base) 1LW-18661 SEAL, Shroud tube 471195 BOX, Set-up 173807 SCREW, Valve adjusting 275906 GASKET, Rocker box cover 1LW-13445 PIN, Piston 178862 RING, Piston compression 278864 RING, Piston, oil regulator 1LW-10077 SEAT, Valve spring 2LW-11621 PISTON 1LW-11625 PLUG, Piston pin 2LW-11633 CYLINDER ASSY., Nitrided 1LW-11634 VALVE, Exhaust 1LW-11795 SPRING, Valve, auxiliary 2LW-11800 SPRING, Valve, outer 2LW-11901 VALVE, Intake 1LW-12892 THRUST BU~M’ON 2

7-3

,-~AVCO LYCOMING 0-235 SERIES PARTS CATALOG

SECTION 7

SERVICE KIT SECTION


O-235-K2A, -K2B, -K2C, -L2A, -L2C, -M1


LW-13969 CYLINDER, PISTON AND RING ASSEMBLY 1

STD-587 NUT, 9116-18 x 5/32 thick 2

STD-1215 BOLT 2

STD-1925 SCREW, 1/4-20 x 5/8 long, fill. hd. 6

1102 PLUG, 1/8 pipe x 3/8 long, socket 1

60009 KEY, Valve 4




LW-13320 SEAT, Valve spring, inner spring 2

61252 SEAT, Valve spring, outer spring 2

62869 RING, Oil seal, cylinder base 1


71195 BOX, Set-up 1



78862 RING, Piston compression 2

78864 RING, Piston, oil regulating 1


LW-11625 PLUG, Piston pin 2

LW-11633 CYLINDER ASSY., Nitrided 1

LW-11634 VALVE, Exhaust 1

LW-11795 SPRING, Valve auxiliary 2

LW-11800 SPRING, Valve outer 2

LW-11901 VALVE, Intake 1

LW-13445 PIN, Piston 1

LW-13623 PISTON 1

LW-12892 THRUST BUTTON 2

7-4

r~AVCO LYCO N1 I NG 0-235 SERIES PARTS CATALOG

SECTION 7

SERVICE KIT SECTION


O-235-C1, -C1B, -C2A, -C2C, -H2C


LW-14126 CYLINDER, PISTON AND RING ASSEMBLY 160009 KEY, Valve 460037 VALVE, Intake 160072 RING, Piston, scraper 1LW-13790 SHAFT, Valve rocker 160827 PIN, Piston 160828 PLUG, Piston pin 260831 ROCKER ASSY., Valve 2LW-16867 RING, Piston, oil regulating 161247 COVER, Rocker box 161251 SEAT, Valve spring, inner 261252 SEAT, Valve spring, outer 262869 RING, Oil seal, cylinder base 1LW-18661 SEAL, Shroud tube 468196 RING, Piston, compression 271195 BOX, Set-up 173807 SCREW, Valve adjusting 273851 PISTON 175906 GASKET, Rocker box cover 173806 PUSH ROD ASSY. 2STD-587 NUT, 9116-18 x 5/32 thick 2STD-1215 BOLT 2STD-1925 SCREW, 1/4-20 x 5/8 long, fill. hd. 6LW-10077 SEAT, Valve spring 2LW-11634 VALVE, Exhaust 1LW-11795 SPRING, Valve, auxiliary 2LW-11800 SPRING, Valve, outer 2LW-12986 CYLINDER ASSY., Plain 1LW-12892 THRUST BUTTON 2

7-5

O LYCO IV1 I NG 0-235 SERIES PARTS CA*TALOG

SECTION 7

SERVICE KIT SECTION


O-235-N2C



STD-587 NUT, 9/16-18 x 5/32 thick 2

STD-1215 BOLT 2



60009 KEY, Valve 4



LW-13320 SEAT, Valve spring, inner 2

61252 SEAT, Valve spring, outer 2




71195 BOX, Set-up 1





78864 RING, Piston, oil regulator 1


LW-13623 PISTON 1








7-6

O LYCO IVI I NG 0-235 SERILS PARTS CATALOG

NUMERICAL INDEX

PART NO. PART NAME PAGE NO. PART NO. PART NAME PAGE NO.

AN365-632A Nut 4-5 LW-12892 Thrust Button 3-5

AN365-632A Nut 6-7 LW-12947 Crankshaft Assy. 1-5

AN500A-416-10 Screw 4-5 LW-12986 Cylinderand HeadAssy. 3-3

AN500-416-12 Screw 4-5 LW-12999 Plate 2-13

AN6-13 Bolt 5-5 LW-13039 Bracket 5-5

AN6-14 Bolt 5-5 LW-13133 Carburetor 6-5

AN6-16 Bolt 5-5 LW-13215 Oil Filter 2-13

AN6-21 Bolt 1-11 LW-13257 Crankcase Assy. 1-1

AN6-34A Bolt 1-11 LW-13282 Crankcase Assy. 1-1

AN777-8D Elbow 2-13 LW-13303 Hook 3´•9

AN816-8 Nipple 2-13 LW-13304 Baffle Assy. 3-9

AN901-8A Gasket 2-13 LW-13320 Seat 3-7

LW-10077 Seat 3-7 LW-13353 Gasket 6-1

LW-10179 Regulator 5-1 LW-13445 Pin 3-1

LW-10185 Regulator 5-1 LW-13623 Piston 3-1

LW-10619 Carburetor 6-5 LW-13675 Support Assy. 1-5

LW-10729 Link 5-5 LW-13775 Impeller Assy. 2-3

LW-11621 Piston 3-1 LW-13790 Shaft 3-5

LW-11622 Stud 1-1 LW-13792 Seal 1-7

LW-11623 Stud 1-1 LW-13884 Bearing 1-7

LW-11625 Plug 3-1 LW-13923 Bushing 3-1

LW-11626 Guide 3-3 LW-14016 Carburetor 6-5

LW-11631 Crankcase Assy. 1-1 LW-14057 Clip 4-4

LW-11632 Ring 1-7 LW-14057 Clip 4-5

LW-11633 CylinderandHead Assy. 3-3 LW-14060 Clip 4-4

LW-11634 Valve 3-7 LW-14060 Clip 4-5

LW-11795 Spring 3-7 LW-14260 Seal 1-1

LW-11800 Spring 3-7 LW-14260 Seal 2-3

LW-11900 Seat 3-3 LW-14301 Alternator 5-7

LW-11901 Valve 3-7 LW-14303 Alternator 5-7

LW-12044 Housing Assy. 2-1 LW-14308 Alternator 5-7

LW-12083 Switch 5-9 LW-14309 Alternator 5-7

LW-12085 Switch 5-9 LW-14310 Alternator 5-7

LW-12098-0-100 Tube Assy. 6-7 LW-14316 Alternator 5-7



LW-12186 Nut 3-1 LW-14324 Alternator 5-7

LW-12681 Gasket 4-1 LW-14746 Gage 1-3

LW-12681 Gasket 4-4 LW-14752 Gage 1´•3

LW-12693 Crankshaft Assy. 1-5 LW-14781 Gage 1-3

LW-12697 Crankshaft Assy. 1-5 LW-14792 Gage 1-3

LW-12699 Crankshaft Assy. 1-5 LW-15496 Carburetor 6-5

LW-12706 Adapter 4-1 LW-15571 Starter 6-9

LW-12706 Adapter 4-3 LW-15592-5-05 Clamp 3-9

LW-12739 Strap 5-7 LW-15592-8-28 Clamp 6-3

LW-12789 Tube Assy. 1-3 LW-15635 Mag. Harness Assy. 4-3

LW-12795 Gasket 2-13 LW-15636 Magneto 4-3

LW-12832 Alternator Assy. 5-7 LW-15637 Mag. Harness Assy. 4-3

LW-12833 Alternator Assy. 5-7 LW-15638 Magneto 4-3

LW-12834 Alternator Assy. 5-7 LW-157208 Kit Assy. 4-1

8-1

L~I7AVCO LYCOMING 0-235 SERIES PARTS CATALOG

NUMERICAL INDEX (Cont.)


LW-157209 Kit Assy. 4-1 LW-51360-58 Magneto 4-1

LW-15866 Harness Assy. 4-3 LW-52305-1 Kit Assy. 4-1

LW-15868 Harness Assy. 4-3 LW-M-2375 Plate 4-5

LW-15896 Regulator 5-1 LW-M-2403 Harness Assy. 4-5

LW-16011 Housing Assy. 2-1 LW-M-2404 Harness Assy. 4-5

LW-16073 Carburetor 6-5 LW-M-2415 Harness Assy. 4-5

LW-16207 Starter 5-9 LW-M-2416 Harness Assy. 4-5

LW-16266-25-13 Clamp 6-7 M-1985-48 Lead Assy. 4-5

LW-16266-25-38 Clamp 2-5 M-1985-72 Lead Assy. 4-5

LW-16266-25-50 Clamp 4-5 MS20822-6 Elbow 2-5

LW-163005-2 Magneto 4-1 STD-8 Washer 1-1



LW-16354 Crankcase Assy. 1-1 STD-8 Washer 2-11

LW-16577 Support Assy. 1-5 STD-8 Washer 2-13

LW-16587 Mag. Harness Assy. 4-3 STD-8 Washer 4-5




LW-16594 Magneto 4-3 STD-8 Washer 6-1

LW-16595 Magneto 4-3 STD-8 Washer 6-3


LW-16677 Carburetor 6-5 STD-33 Washer 1-5


LW-16699 Seat 3-3 STD-33 Washer 2-9

LW-1 j701 Cylinder Head Assy. 3-3 STD-35 Washer 2-3

LW-16703 Cylinder Head Assy. 3-3 STD-35 Washer 2-5

LW-16704 Cylinder Head Assy. 3-3 STD-35 Washer 2-7

LW-16728 Pipe 6-3 STD-35 Washer 3-5

LW-16729 Pipe 6-3 STD-35 Washer 5-3

LW-16730 Pipe 6-3. STD-35 Washer 5-5

LW-16731 Flange 6-3 STD-35 Washer 5-9

LW-16867 Ring 3-1 STD-43 Nut 1-1

LW-16907 Carburetor 6-5 STD-68 Pin 1-1

LW-18290 Cylinder Head Assy. 3-3 STD-68 Pin 5-3

LW-18661 Seal 3-7 STD-68 Pin 6-1

LW-18694 Support Assy. 1-5 STD-111 Gasket 2-13

LW-18697 Crankshaft Assy. 1-5 STD-131 Screw 1-1

LW-18735 Crankcase Assy. 1-1 STD-160 Washer 1-1


LW-31-1.09 Bolt 5-9 STD-160 Washer 2-3

LW-31H.75 Bolt 5-3 STD-160 Washer 2-11

LW-31H.75 Bolt 5-5 STD-160 Washer 2-13

LW-38-.75 Bolt 2-9 STD-160 Washer 4-5







8-2




STD-208 Seal 2-11 STD-1227 Washer 6-1

STD-251 Washer 3-9 STD-1350 Plug 2-13

STD-294 Gasket 2-13 STD-1409 Nut 1-11

STD-406 Dowel 1-3 STD-1409 Nut 6-1

STD-425 Washer 1-7 STD-1410 Nut 2-7








STD-551 Plug 6-1 STD-1411 Nut 2-13

STD-553 Screw 4-5 STD-1411 Nut 4-5

STD-553 Screw 6-7 STD-1411 Nut 5-3


STD-587 Nut 3-5 STD-1411 Nut 5-6

STD-596 Nut 1-11 STD-1411 Nut 6-1


STD-665 Screw 3-9 STD-1414 Bolt 1-11

STD-678 Washer 1-11 STD-1414 Bolt 5-3


STD-684 Nipple 3-9 STD-1416 Bolt 1-11



STD-700 Elbow 3-3 STD-1420 Nut 2-3

STD-705 Bolt 1-9 STD-1420 Nut 5-3

STD-713 Pin 5-5 STD-1433 Bolt 6-1

STD-761 Cotter Pin 4-4 STD-1646 Bolt 2-3

STD-783 Plug 2-1 STD-1727 Washer 4-1



STD-847 Screw 1-5 STD-1727 Washer 5-5

STD-853 Tee 6-7 STD-1774 Pin 2-7

STD-872 Nut 1-11 STD-1774 Pin 2-11

STD-872 Nut 5-5 STD-1834 Bolt 5-3

STD-1045 Gasket 1-7 STD-1835 Bolt 5-3

STD-1045 Gasket 6-1 STd-1838 Bolt 2-5

STD-1065 Dowel 1-5 STD-1838 Bolt 5-5

STD-1111 Elbow 1-1 STD-1856 Screw 2-13

STD-1196 Hose 6-3 STD-1858 Bolt 5-5

STD-1198 Bolt 1-5 STD-1874 Screw 4-5

STD-1204 Bolt 2-3 STD-1875 Bolt 1-1

STD-1204 Bolt 6-1 STD-1882 Screw 2-9

STD-1211 Plug 1-5 STD-1885 Bolt 2-3

STD-1214 Screw 1-5 STD-1925 Screw 3-5

STD-1215 Bolt 5-3 STD-1930 Hose 2-5

STD-1215 Bolt 5-5 STD-2084 Bolt 1-11

STD-1215 Bolt 6-3 STD-2084 Bolt 5-3

STD-1221 Ring 2-7 STD-2084 Bolt 5-5

8-3

rr?i~AVCO L~COMING 0-235 SERIES PARTS CATALOG



STD-2106 Nut 3-5 60928 Tube Assy. 3-9

STD-P 156 Bolt 5-9 61084 Spring 1-7

STD-2180 Hose 3-9 61098 Adapter Assy. 2-11

25C-10 Stud 2-13 61151 Shaft 1-9

25C-ll Stud 6-1 61155 Gear 1-6

25(=-22 Stud 2-1 61156 Lockplate 1-5

31C-12 Stud 1-1 61163 Gear 4-1

31C-12 Stud 2-1 61163 Gear a-3

31C-12 Stud 3-3 61173 Gasket 2´•13

31C-13 Stud 1-1 61174 Shaft 2-3

31C-19 Stud 2-1 61175 Adapter 2-1

31CD-17 Stud 2-1 61182 Stud 1-1

38-12 Stud 1-1 61183 Gasket 2-11

38-13 Stud 1-1 61227 Lever 1-1

44-13 Stud 1-1 61247 Cover 3-6

383-B Nut 3-5 61252 Seat 3-7

1028-B Ball 1-7 61258 Seat 3-3

1102 Plug 1-1 61269 Flange 3-5

1102 Plug 2-1 61260 Flange 3-6

1102 Plug 2-7 61368 Plug 6-1

1102 Plug 6-7 61374 Sump Assy. 6-1

1182-B3 Spark Plug 4-7 61376 Connection 6-1

1182-B6 Spark Plug 4-7 61377 Connection 6-1

1182-B7 Spark Plug 4-7 61378 Screen 6-1

1182-53 Spark Plug 4-7 61381 Tube Assy. 6-1

1182-P3 Spark Plug 4-7 61400 Stud 2´•1

8313 Gasket 2-11 61510 Plug 1-5

45530 Ring 1-9 61520 Bearing 1-7

45688 Flange 1-5 61531 Gasket 1-1

60009 Key 3-7 61533 Bearing 1-7

60037 Valve 3-7 61544 Plunger 1-9

60072 Ring 3-1 61547 Carburetor 6-6

60096 Gasket 2-9 61554 Cover 1-1

60337 Seat 3-3 61555 Plug 1-I

60398 Bushing 3-5 61583 Cover 1-1

60430 Cover 2-11 61584 Valve 1-1

60592 Gasket 6-5 61665 Gear 4-1

60733 Shim 5-3 61665 Gear 4-3

60746 Impeller 2-3 61681 Guide 3-3

60803 Strap 1-11 62219 Gage 1-3

60814 Bushing 1-5 62224 Gasket 4-1

60820 Gasket 6-1 62224 Gasket 4-3

60821 Tube Assy. 3-9 62318 Sump Assy. 6-1

60827 Pin 3-1 62415 Plunger 2-13

60828 Plug 3-1 62417 Plug 2-13

60831 Rocker Assy. 3-5 62817 Screen Assy. 2-13

60882 Gear 1-5 62833 Regulator 6-1

60886 Belt 5-1 62869 Ring 3-5

60890 Tube Assy. 3-9 65098 Cover 2-9

60903 Tube 3-7 66321 Gasket 3-5

8-4

LYCOMING 0-235 SERILS PARTS CATALOG



65614 Plug 3-9 72842 Plug 1-366531 Valve 3-7 72844 Plug 1-366796 Insert 3-3 72970 Gear Assy. 2-1167556 Stud 2-7 73206 Housing Assy. 2-168196 Ring 3-1 73259 Housing Assy. 2-168315 Gasket 2-7 73383 Lockplate 5-568317 Shaftgear 2-7 73757 Bushing 1-568593 Spacer 2-11 73806 Rod Assy. 3-568763 Bearing 1-7 73807 Screw 3-568767 Generator 5-7 73817 Lockplate 1-968790 Housing Assy. 2-1 73818 Gasket 2-168792 Housing Assy. 2-1 73851 Piston 3-168796 Housing Assy. 2-1 74065 Ring 1-368798 Housing Assy. 2-1 74068 Ring 1-368800 Housing Assy. 2-1 74070 Elbow 2-568802 Housing Assy. 2-1 74124 Stud 1-168942 Support Assy. 1-5 74217 Ring 1-368974 Housing 2-13 74225 Nipple Assy. 6-769113 Bracket 5-3 74314 Plug 1-369340 Support Assy. 1-5 74360 Flange 6-369373 Bearing 3-1 74628 Housing Assy. 2-169436 Spring 2-13 74996 Gear Assy. 1-969452 Bracket 5-3 75072 Gear Assy. 1-969510 Housing 2-13 75153 Adapter Assy. 2´•769796 Dowel 1-1 75165 Clip 2-569951 Strut 5-3 75167 Tube Assy. 2-569953 Starter 5-9 75246 Fuel Pump 2-971032 Bushing 1-7 75380 Link 5-671105 Body 1-7 75706 Camshaft Assy. 1-671596 Washer 2-7 75708 Shaft Assy. 1-971596 Washer 2-11 75735 Tube 1-371611 Retainer 3-9 75736 Tube 1-371620 Bolt 2-13 75767 Tube 1-371623 Washer 2-13 75906 Gasket 3-571744 Generator 5-7 75944 Valve Assy. 2-1371746 Regulator 5-1 75965 Clamp 4-171828 Cylinder Head Assy. 3-3 76026 Belt 6-171909 Clamp 4-5 76028 Link 6-371909 Clamp 6-7 76124 Support Assy. 1-571973 Gasket 6-3 76210 starter 5-972053 Gasket 2-7 76529 Plug 1-772059 Gasket 1-3 76534 Shim 5-572091 Ring 1-7 76734 Zip Strap 4-572205 Regulator 5-1 76923-48870-63 Lead Assy. 4-572220 Gasket 1-3 76923-72890-63 Lead Assy. 4-572312 Ring 1-3 76944 Support Assy. 1-572378 Cover 2-7 76961 C~mp 4-472495 Gear 4-1 77309 Bushing 1-972496 Housing Assy. 2-1 77527 Extension 1-372566 Gear 1-5 77585 Carburetor 6´•5

8-5

~I/IAVCO LYCO rVI I NG 0-235 SERILS PARTS CATALOG



77611 Gasket 3-5 78158 Bracket 5-5

77743 Harness Assy. 4-3 78213 Crankcase Assy. 1-1

77745 Harness Assy. 4-3 78214 Crankcase Assy. 1-1

77808 Valve Assy. 1-7 78308 Alternator 5-7

77852 Base Assy. 2-13 78368 Pin 1-9

77853 Housing Assy. 2-13 78401 Alternator 5-7

77939 Carburetor 6-5 78426 Support Assy. 1-5

78027 Bolt 3-1 78531 Body Assy. 2-3

78030 Rod Assy. 3-1 78862 Ring 3-1

78059 Relay 5-1 78864 Ring 3-1

8-6

0-235-P2A

Parts Catalog

PI~RTS

Pc-30 -1

LVCONIINO

0-235-P2A.

IIe~l

I ,D 77

~i Ililllil

PRICE ~j5.00 AUGUST 1985

~AVCO LYCOMING WILLIAMSPORT DIVISION

652 Oliver Street, Williemsport, Pennsylvania 17701

ooAvco LYCOMING ENGINE GROUP

RECORD OF REVISIONS

O-235-P2A

MFG REV

NO DESCRIPTION ISSUEDATE ATPREVDATE INSERTEDBY

RECORD OF TEMPORARY REVISIONS

p ATP REV INSERT DATE REV REMOVE

REV NO DESCRIPTION ISSUE DATE DATE BY REMOVED INCOR BY

~AVCO LYCOMING 0-235-P2A PARTS CATALOG

INTRODUCTION

This illustrated parts catalog contains a complete parts listing for the Avco Lycoming O-235-P2A model air-craft engines.

Major assembly and sub-assembly parts of the engines are listed in the Group Assembly sections in thegeneral sequence of engine build up.

A Service Kits section and Oversize and Undersize Parts List are included to aid in ordering parts as necessaryduring overhaul.

The Numerical Index is provided for convenience in finding parts when only the part number is known.

Parts coverage of Vendor Accessories used on Avco Lycoming engines may be found in the appropriate Ven-dor’s Parts Catalog. A list of these publications appear in the latest edition of Service Letter No. L114.

NOTE

The illustrations, pictures and drawings shown in this publication are typical of the subject matter they por-tray.

This catalog, when used in conjunction with the appropriateoverhaul manual, shall be used forparts identifica-tion only. Under no circumstances shall this catalog be used as an assembly or installation document.

Any reference in this document to a supplierslparts manufacturers’ product, by name, trademark, partnumber or other description is solely for the purposes of identification and does not indicate or infer that AvcoLycoming accepts responsibility for quality control andlor airworthiness of parts which do not pass through theAvco Lycoming quality control system.

SERVICE BULLETINS, INSTRUCTIONS AND LETTERS

Although the information contained in this parts catalog is up-to-date at time of publication, users are urged tokeep abreast of later information through all Avco Lycoming distributors or from the factory by subscription.Consult the latest edition of Service Letter No. L114 for subscription information.

HOW TO ORDER PARTS

In ordering parts for your engine, observe the following instructions which will expedite shipment of correctparts required without delay.

a. Always specify the model and serial number of your engine.

b. Always specify Part Number, Nomenclature and quantity required.

~nA\’CO LYCONI I NG 0-235-P2A PARTS CATALOG

TABLE OF CONTENTS

SECTION PAGE

Introduction i

Table of Contents

Oversize and Undersize Parts List m

1. CRANKCASE, CRANKSHAFT AND CAMSHAFT GROUP

CranltcaseAssemblyOil Level Gage AssemblyCrankshaft, Camshaft and Related Parts 1-5

Crankcase Related Parts

Crankshaft Idler Gears andTachometer Shaft ´•1-9

CrankcaseAttaching Parts ´•1-11

2. ACCESSORY HOUSING AND RELATED PARTS

Accessory HousingAssembly 2-1

Oil Pump Assembly and Accessory HousingAttaching Parts 2-3

Propeller GovernorOil Line 2-5

Propeller Governor Drive and Cover 2-7

Fuel Pump Assembly and Attaching Parts 2-9

Vacuum Pump Drive andCover 2-10

Oil FilterAssembly andOil Cooler BypassValve 2-11

3. CYLINDER, PISTON AND VALVE TRAIN

Connecting Rods, Pistons and Ring Assemblies 3-1

Cylinder AssemblyCylinder Related Parts

Valve AssemblyCylinder Head Drain Tubes and Intercylinder Cooling Baffles 3-9

4. IGNITION SYSTEM

Magnetos, Drives, Harnesses and Spark Plugs 4-1

5. ELECTRICAL COMPONENTS

Starter Motor and Attaching Parts 5-1

6. OIL SUMP AND INDUCTION SYSTEM

Oil Sump Assembly andOil Suction Screen 6-1

Intake Pipe AssemblyCarburetor AssemblyPriming System

7. SERVICE KIT SECTION

Seal and Gasket Set

Cylinder, Pistonand RingAssembly 7-2

8. NUMERICALINDEX

LYCOMING 0-235-P2~ PARTS CATALOG

Oversize and Undersize Parts Listing

PART NO. DESCRIPTION OVERSIZE UNDERSlZEP02 P05 P10 P15 P20 P30 P40 P50 M03 N06 NI10.002 .005 .010 .015 .020 .030 .040 .050 .003 .006 .010

60814 BUSHING X X X X

61681 GUIDE X X X X X

66796 INSERT X

68763 BEARINGX X X

69373 BEARING X X X X69796 DOWEL X

73757 BUSHING X X X X

LW-11626 GUIDE X X X X X

LW-11900 SEAT X X X

LW-13792 SEAL

LW-13884 BEARING X X X XLW-16699 SEAT X X X

STD-1065 DOWEL X X X X

In addition to the above, studs are available in P01, P02, P03, P05, P07, P1D P12.

NOTE

When ordering oversize and undersize parts, be sure to specify the required oversize and undersize dimension along with the properpart number. For example, to order bearing LW-13884 in .003 undersize, order part number LW-13884-M3. Oversize code letter is’’P’’ while undersize code letter is ’’M’’. These letters are then followed by the number designating the size in thousandths of aninch.

I vr.ORnlNG 0-235-P2A PARTS CATALOG


CRANKCASE ASSEMBLY

FIG. QUANTITY

REF. PART PER

1 NUMBER DESCRIPTION ASSEMBLY

1 LW-16354* CRANKCASE ASSEMBLY 1

2 STD-557 DOWEL, 1/2 dia. x 19/32 long, hollow 2

3 LW-11623 STUD, 7/16-20 x 10-7/16 long 2

4 LW-11622 STUD, 7/16-14 x 9-25/32 long 4

5 44-13 STUD, 7/16-14 x 1-5/8 long 8

6 38-13 STUD, 3/8-16 x 1-5/8 long 16

7 1102 PLUG, 1/8-27 NPT, Alien 3

8 STD-514 DOWEL, 5/16 dia. x1/2 long 2

9 69796 DOWEL, Crankshaft bearing 2

10 STD-111 ELBOW, 3/4 pipe hose (900) 1

11 310-12 STUD, 5/16-18 x 1-1/2 long 4

Used with variable pitch prop.

1-1

L~AVCO LYCOMING O-235-P2A PARTS CATALOG

/--10

31,

clc_i,qr,:/

11 k7. i.:

’,a ~1 -:~f.lr~ 0!~ Q

gBli\ ‘~v 8jcil,)i\r cl

~Ff

7\

ji-

8 i./II,

4

I

5 )-3

~j

5

O i\

Figure 1. CRANKCASE ASSEMBLY

1-2

d~AVCO LYCOMING 0-235-P2APARTS ~ATALOG


OIL LEVEL GAGE ASSEMBLY

FIG. QUANTITY

REF. PART PER


1 75767 TUBE, Oil level gage 1

2 72059 GASKET, Oil level gage 1

3 74065 RING, Oil level gage seal 1

4 LW-14781 GAGE ASSY., Oil level 1

5 72844 PLUG, Oil level gage 1

1-3

Lk7AVCC~ I VCOMING O-235-P2A PARTS CATALOG

i

/r

~I la ´•-~i3---3_

a; ;II~I

i"J/´•

Figure 2. OIL LEVEL GAGE ASSEMBLY

I VCOIVIING 0-235-P2A PARTS CATALOG


CRANKSHAFT, CAMSHAFT AND RELATED PARTS

FIG. QUANTITY

REF. PART PER


1 LW-12695* CRANKSHAFT ASSEMBLY f

2 STD-1211 PLUG, 2.00 dia. expansion 1

3 STD-1065 DOWEL, Stepped, 19/64 x 1/4 dia. x 35/64 long 1

4 61510 PLUG, 1-3/4 O.D. 1

5 73757 BUSHING, Propeller flange tinder) 1

6 60814 BUSHING, Propeller 5

7 75706 CAMSHAFT 1

8 61155 GEAR, Crankshaft 1

9 LW-18639 LOCKPLATE, Crankshaft gear 1

10 STD-2213 SCREW, 5/16-24 x 1.00 long 1

11 LW-13675 SUPPORT ASSY., Starter ring gear, 10/12 pitch 3.25:1 drive 1

12 60882 GEAR, Starter ring, 10/12 pitch 1


1-5

~AVCO LYCOMING O-235-P2A PARTS CATALOG

4

NO. 1

a

O6

INDEXt --tt~fOY 6

C/-’"7 a

Figure 3, CRANKSHAFT, CAMSHAFT AND RELATED PARTS

1-6

~nA\’CO LYCON1ING 0-235-P2A PARTS CATALOG


CRANKCASE RELATED PARTS

FIG. QUANTITY

REF. PART PER


1 10288 BALL, 11/16 dia. 1

2 61084 SPRING, Oil pressure relief valve 1

3 STD-425 WASHER, No. 10 plain (max. 9) AR

4 STD-1045 GASKET, 1-1/4 I.D, x 1-1/2 O.D, x 3/32 annular 1

5 76529 PLUG, Oil relief valve 1

6 68763* BEARING, Crankshaft (use in pairs) 4

7 LW-1 3884* BEARING, Crankshaft, front 2

8 LW-13792 SEAL, Crankshaft oil 1

9 72091 RING, Oil seal 23/64 I.D. x 7/64 dia. section 8

10 71105 BODY, Tappet 8


1-7

LYCOMING O-235-P2A PARTS CATALOG

io

C

y"l,

~"7j

iC~1’

7

I

1/-"~IiC"i ~ca

r

a~-i! 7

r

‘;CC\a~;II

kY

1

5

Figure 4. CRANKCASE RELATED PARTS

1-8

I VCONIING 0-235-P2A PARTS CATALOG

CRANKCASE, ORANKSHAFT AND CAMSHAFT GROUPCRANKSHAFT IDLER GEARS AND TACHOMETER SHAFT

FIG. QUANTITYREF. PART PER


1 61544 PLUNGER, Fuel pump, long 1

2 74996 GEAR ASSY., Crankshaft idler 1

3 77309 BUSHING, Crankshaft idler gear 1

4 75072 GEAR ASSY., Crankshaft idler 1

5 77309 BUSHING, Crankshaft idler gear 1

6 75708 SHAFT ASSY., Tachometer 1

7 LW-18667 PIN, 3/16 x 2-5/16 long 1

8 45530 RING, Oil pump shaft retaining 1

9 61151 SHAFT, Crankshaft idler gear 2

10 173817 LOCKPLATE, 1/4 bolt, 1-3/4 spacing 2

11 STD-705 BOLT, 1/4-20 x 11/16 long 4

1-9

L~AVeO LYCOMING 0-235-P2A PARTS CATALOG

.r13’"--

P-

i Ib 3i

r3 a19\.--.-:j8 ,o?

1?

h I

cji;’ii i~3,ii

4-\5\\\\ \i/

10

11

Figure 5. CRANKSHAFT IDLER GEARS AND TACHOMETER SHAFT

1-10

LMAVCO LYCOMING 0-235-P2A PARTS SATALOG


CRANKCASE ATTACHING PARTS

FIO. QUANTITY

REF. PART PER


1 LW-25-1.50 BOLT, 1/4-20 x 1-1/2 long, hex. head 8


3 60803 STRAP, Lifting 1

4 LW-25-1.75 BOLT, 1/4-20 x 1-3/4 long, hex. head 1

5 AN6-21 BOLT, 3/8-24 x 13/64 long, hex. head drive 1

6 STD-160 WASHER, 1/4 lock, internal lock 9

7 STD-1411 NUT, 1/4-20 plain 9

8 LW-25S1.50 BOLT, 1/4-20 x 1-1/2 long, dr. end 3

9 STD-8 WASHER, 1/4 plain (Max. 9) AR

10 ISTD-1409 NUT, 1/4-20 slotted shear 3


12 ISTD-872 NUT, 3/8-24, slotted 1

13 IAN6-34A BOLT, 3/8-24 x 37/64 long, hex, hd. 2


15 ISTD-678 WASHER, 3/8 lock, internal teeth 2

16 ISTD-596 NUT, 3/8-24 plain 2

1-11

~AVeC) LYCOMI NG O-235-P2A PARTS CATALOG

3-\

1,2,6,77n 4,67 ,1, 2,8.7 ~5,11.12

0 0 i3OO O

1,2,6,7

13,14,15,16

O O

O 8 O

13,14~15,16

6 ,7,8,9

1,6.7,9

1 ,2,6 ~7--V UL 6, Q rl 6

Figure 6. CRANKCASE ATTACHING PARTS

1-12

L~AVCO LYCOMING O-235-P2A PARTS CATALOG


ACCESSORY HOUSING ASSEMBLY

FIG. QUANTITY

REF. PART PER


1 73818 GASKET, Accessory housing 1

2 LW-12044 HOUSING ASSEMBLY, Accessory 1

3 310-12 STUD, 5/16-18 x 1-1/2 long 6

4 310-19 STUD, 5/16-18 x 2-3/8 long 2

5 3100-17 STUD, 5/16-18 x 2-1/8 long, drilled 3

6 1102 PLUG, 1/8-27 NPT 2

7 61175 ADAPTER, Tachometer 1

8 STD-783 PLUG, 1/4-28 NPT, Alien 1

9 61400 STUD, 1/4-20 x 1-3/16 long 2

;O 25C-22 STUD, 1/4-20 x 2-3/4 long 4

11 STD-784 PLUG, 3/8-18 NPT, Alien 1

2-1

~AVCCI I vr.OMING O-235-P2A PARTS CATALOG

i

10

(9

I/o

CS’

\B r3 6~ :i

/0:

J

I

Figure 7. ACCESSORY HOUSING ASSEMBLY

2-2

I vr~onniruc 0-235-P2A PARTS CATALOG


OIL PUMP ASSEMBLY AND ACCESSORY HOUSING ATTACHING PARTS

FIO. QUANTITY

REF. PART PER


1 78531 BODY ASSY., Oil pump 1

2 LW-18110 IMPELLER ASSY., Oil pump driven 1

3 61174 SHAFT, Oil pump driven 1

4 LW-18109 IMPELLER, Oil pump driving 1


6 STD-1420 NUT, 5/16-18 slotted 3

7 LW-14260 SEAL, Tachometer drive, oil 1

8 STt)-8 WASHER, 1/4 plain 13


10 LW-25-2.00 BOLT, 1/4-20 x 2.00 long, hex. head 2

11 LW-25-0.94 BOLT, 1/4-20 x 15/16 long, hex. head 10

12 STD-1411 NUT, 1/4-20 plain 2

2-3

Lp7A1VCC) I vr.OR/IING 01235-P2A PARTS CATALOG

8,9111

i~5riF

T)

71Ici

~LL_

8,9

C? ~-R-cr-8,9,11

iI ji /j Ili´•-- ’e,icdcl

c~L, 311 ~b

ii

1

Figure 8. OIL PUMP ASSEMBLY AND ACCESSORY HOUSING ATTACHING PARTS

2-4


ACCESSORV HOUSING AND RELATED PARTS

PROPELLER GOVERNOR OIL LINE

FIO. QUANTITYREF. PART PER


1 75167 TUBE ASSY., Prop. governor oil line 1

2 STD-1930 HOSE, 3/8 I.D. x 1.00 long 1

3 75165 CLIP, Prop. governor oil line support 1



6 STD-1838 BOLT, 5/16-18 x 15/16 long, hex. hd. 1

7 L -16266-25-38 CLAMP 1

8 MS20822-6* ELBOW, 3/8 flared tube 1/4 NPT, 900

9 74070** ELBOW, 3/8 flared tube 9/16-18 str. thd., adj. 450 1

10 1 MS29512-06 "O" RING 1

Assemble in right crankcase, front.Assemble in prop. governor adapter.

2-5


a´•a

i dY

I~13’4

i d-I 3

:I´•´•3 I

a-I

0/

k 6yioi,

Figure 9. PROPELLER GOVERNOR OIL LINE

2-6

~AVCO I vr.OMING O-235-P2A PARTS CATALOG


PROPELLER GOVERNOR DRIVE AND COVER

FIG. QUANTITY

REF. PART PER


1 68317 SHAFTGEAR, Prop. governor drive 1

2 71596 WASHER, Accessory driven gear 1

3 STD-1221 RING, 13/16 dia. x 3/64 thick, internal retaining 1

4 68315 GASKET, Accessory drive adapter 1

5 75153 ADAPTER ASSY., Prop. governor drive 1

6 1102 PLUG, 1/8-27 NPT, Alien 1

7 310-16 STUD, 5/16-18 x 2.00 long 4

8 STD-I 774 PIN, 1/8x1/41ong 1


10 ISTD-475 WASHER, 5/16 internal lock 4

11 ISTD-1410 NUT, 5/16-18 plain 4

12 172053 GASKET, Governor 1

13 72378 COVER, Governor drive 1

14 ISTD-35* WASHER, 5/16 plain AR

15 STD-475 WASHER, 5/16 internal lock 4

16 STD-1410 NUT, 5/16 plain 4

32 required for Woodward governor; 4 required for AN governor.

2-7

~DIAVCe) LYCOMING 0-235-P2A PARTS CATALOG

P’

‘~LL)ii_ ii

/i

14I\T"\12ya9

109

a 6

Figure 10. PROPELLER GOVERNOR DRIVE AND COVER

2-8

~nA\’CO LYCOr~l I NG 0-235-P2A PARTS CATALOG


FUEL PUMP ASSEMBLY AND ATTACHING PARTS

FIG. QUANTITY

REF. PART PER


1 60096 GASKET, Fuel pump 1

2 LW-15472 FUEL PUMP, Low pressure, dual diaphragm (6441271) 1


4 STD-1882 SCREW, 3/8-16 x 1-9/32 long, socket head, dr. hd. 2

j‘C)

r,

g~"

(C´•

Q

-i

~i

Figure 11. FUEL PUMP ASSEMBLY AND ATTACHING PARTS

2-9

~AVCO LYCOMING O-235-P2A PARTS CATALOGACCESSORY HOUSING AND RELATED PARTS

VACUUM PUMP DRIVE AND COVER

FIG.QUANTITY

REF. PARTPER


1 61183 GASKET, Accessory adapter 12 61098 ADAPTER ASSY., Vacuum pump 13 STD-1774 PlN, 1/8 dia. x 1/4 long 14 STD-2217 SEAL, Oil, 7/8 I.D. x 15 72970 GEAR ASSY., Vacuum pump driven6 71596 WASHER, Accessory driven gear 17 8313 GASKET, Vacuum pump8 60430 COVER, Vacuum pump 19 STD-8 WASHER, 1/4 plain 4

10 ISTD-160 WASHER, 1/4 lock4

11 (STD-1411 NUT, 1/4-20 plain 4

´•´•9´•

ai/ ~ai

6 ’17‘

8

lo

11?\9 o10

cDQ’’S’, o

Cs;l da,

\--2

Figure 12. VACUUM PUMP DRIVE AND COVER

2-10

~avco LvcoMI NG C-235-P2A PARTS CATALOG


OIL FILTER ASSEMBLY AND OIL COOLER BYPASS VALVE

FIO. QUANTITY

REF. PART PER


1 LW-12795 GASKET, Oil filter adapter 2

2 LW-12999 PLATE, Dil filter adapter 1

3 77852 BASE ASSY., Oil filter 1

4 LW-13215 OIL FILTER, Short, spin-on 1


6 STD-160 WASHER, 1/4 lock 1

7 STD-1411 NUT, 1/4-20 plain 1

8 STD-1856 SCREW, 1/4-20 x 1.00 hex. hd., self-locking 3

9 75944 VALVE ASSY., Temp. control, oil cooler bypass 1

10 76510 GASKET, Valve assembly 1

11 250-10 STUD, 1/4-20 x 1-1/4 long 1

12 STD-294 GASKET, 7/8 x 5/8 I.D. x 3/32 annular 1

13 62417 PLUG, Oil cooler bypass 1

14 STD-784 PLUG, 3/8 NPT 2

2-11

~nA\ ’CO LYCnNI I NG 0-235-P2A PARTS CATALOG

e~i

/P/

i~R r.\ili-

11

2I\1Qjci~C/ 4\($ L~"(

C)c~

’3’1

1-´•´•-;jf

"o i~o

7/Q Sj\/j

i\i’G ´•?1 A\j CL’i)jii

ia´• (\rl~

i.´•Y ’j

10

8

a 9-/

Figure 13. OIL FILTER ASSEMBLY AND OIL COOLER BYPASS VALVE

2-12

I vc~OlVIING 0-235-P2A PARTS CATALOG


CONNECTING RODS, PISTONS AND RING ASSEMBLIES

FIG. QUANTITY

REF. PART PER


1 78030 ROD ASSY., Connecting 4

2 LW-13923 BUSHING, Connecting rod, upper 4

3 78027 BOLT, Connecting rod 8

4 LW-12186 NUT, Connecting rod 8

5 69373 BEARING, Connecting rod 8

6 LW-13623 PISTON, Compression ratio 8.5:1 4

7 LVy-13445 PIN, Piston 4

8 LW-11625 PLUG, Piston pin 8

9 78862 RING, Piston, compression 8

10 78864 RING, Piston, oil regulating, expander type 4

3-1


::biI

Figure 14. CONNECTING RODS, PISTONS AND RING ASSEMBLIES

3-2

~AVCO I VCOMING O-235-P2A PARTS CATALOG


CYLINDER ASSEMBLY

FIG. QUANTITY

REF. PART PER


1 LW-18290* CYLINDER HEAD ASSY., Nitrided 4

2 LW-11900 SEAT, Intake valve 4

3 LW-16699 SEAT, Exhaust valve (Allison valve seat) 4

4 61681 GUIDE, Valve, intake (flanged) 4

5 LW-11626 GUIDE, Valve, exhaust (flanged) 4

6 66796 INSERT, Spark plug, 18-1.5 MM 8

7 31C-12 STUD, 5/16-18 x1-1/2 long 8

8 STD-700 ELBOW, 900, 3/8 flared tube 4

Incorporates Allison exhaust valve seats.

3-3

~AVCO LYCOMING O-235-P2A PACTS CATALOG

liil I I:lii/P

lil,

i

;;´•c~I a

e en

8~5

Figure 15. CYLINDER ASSEMBLY

3-4

I vr.OiVIING 0-235-P2A PARTS CATALOG


CYLINDER RELATED PARTS

FIG. QUANTITY

REF. PART PER


1 383-6 NUT, 3/8-24 plain 16

2 STD-2106 NUT, 7/16-20 plain 16

3 73806 ROD ASSY., Push 8

4 60831 ROCKER ASSY., Valve 8

5 60398 BUSHING, Valve rocker 8

6 73807 SCREW, Valve adjusting 8

7 STD-587 NUT, 9/16-18 x 5/32 thick 8

8 LW-13790 SHAFT, Valve rocker 4

9 LW-12892 THRUST BUTTON, Rocker shaft 8

10 175906 GASKET, Rocker box 4

11 61247 COVER, Rocker box 4

12 STD-1925 SCREW, 1/4-20 x 5/8, self-locking 24



15 STD-1410 NUT, 5/16-18 plain 8

16 62869 RING, Oil seal, 3/32 dia, x 4-3/8 4

17 LW-19296 GASKET, Exhaust flange 4

18 61260 FLANGE, Exhaust, stainless 4

3-5

~IAVCO LYCOMI N O-235-P2A PARTS CATALOG

~Sa I~ 2

i~jilJjj ’j Ijci

7

"7 7C://

C@’‘ 1;i IiiIs~I´•i,i i1S´•;

9

5 a

&I nIIJ~l’i

17

oy ~o

8 12~

Figure 16. CYLINDER RELATED PARTS

3-6

~nA\’CO LYCO1VI I NG 0-235-P2A PARTS CATALOG


VALVE ASSEMBLY

FIG. QUANTITY

REF. PART PER


1 LW-11901 VALVE, Intake 4

2 LW-1 9034 VALVE, Exhaust 4

3 61252 SEAT, Valve spring, outer 8

4 LW-13320 SEAT, Valve spring, inner 8

5 LW-11795 SPRING, Valve, auxiliary 8

6 LW-11800 SPRING, Valve, outer 8

7 LW-10077 SEAT, Valve spring 8

8 6’0009 KEY, Valve 16

9 LW-18661 SEAL, Shroud tube 16

10 60903 TUBE, Push rod shroud 16

3-7

C) I VCORn I NG 0-235-P2A PARTS CATALOG

/-9f~´•\

i

I´•I

/i/?niii/

IliiiiI i I i ,%3I

S;/e~li~e ~ij ’I’i,

,i,i i

ic,c,,s´•i~illii’I3

6/

5~7

Figure 17. VALVE ASSEMBLY

3-8

L;I~TAVCO LYCOMING O-235-P2A PARTS CATALOG


CYLINDER HEAD DRAIN TUBES AND INTERCYLINDER COOLING BAFFLES



1 STD-684 NIPPLE, Straight, 3/8 l.D, hose 4

2 STD-2180 HOSE, 3/8 I.D. x 1-13/16 long 4

3 LW-1 5592-5-05 CLAMP, Hose 8



6 60928 TUBE ASSY., Oil drain, cyls. no. 3 4 2

7 LW-13304 BAFFLE ASSY., Intercylinder 2

8 71611 RETAINER, Intercylinder baffle 2

9 LW-13303 HOOK, Intercylinder baffle retainer 2

10 65614 PLUG, Baffle attaching 4

11 ISTD-251 WASHER, No. 10 lock 4

12 ISTD-665 SCREW, No. 10-32 x 3/4 long, fill. hd. dr. 4

3-9

~AVC=O LYCOMING 0-235-P2A PARTS CBTALOG

i

i Ir;

j

´•i~ 12

i,

4.5.6

Figure 18. CYLINDER HEAD DRAIN TUBES AND INTERCYLINDER COOLING BAFFLES

3-10

I V~70(VIING 0-2351P2A PARTS CATALOG

IGNITION SYSTEM

MAGNETOS, DRIVES, HARNESSES AND SPARK PLUGS

FIG. QUANTITY

REF. PART PER


1 61665 GEAR, Magneto, impulse coupling 1

2 61163 GEAR, Magneto 1

3 62224 GASKET, Magneto adapter and magneto 3

4 LW-12706 ADAPTER, Magneto, impulse coupling 1

5 LW-163045-6 MAGNETO, S4LN-204 (with electric tach. pickup) 1

LW-51360-54 MAGNETO, Impulse coupling,. S4LN-21 1

6 STD-1727 WASHER, Plain, 3/4 0.D. x 21/64 I.D. x1/8 thick 4


8 STD-1410 NUT, 5/16-18 plain 4

9 CWr147209 KIT, Magneto ground terminal (w/S4LN-204) 1

LW-52305-1 KIT ASSY., Magneto ground terminal (w/S4LN-21) 1

10 LW- M-24~3 HARNESS ASSY., Left magneto (Slick) 1

LW-M-2404 HARNESS ASSY., Right magneto (Slick) 1

11 ILW-M-2375 PLATE, Spark plug cable 2

12 LW-14060 CLIP, Two wire for 1/4 screw 3



15 IAN500-416-12 SCREW, 1/4-20 x 3/4 long, fill. head 1

16 ISTD-1411 NUT, 1/4-20 plain 1

17 IAN500A-416-10 SCREW, 1/4-20 x 5/8 long 1

18 LW-18959-150-25 CLAMP, 1-1/2 I.D., offset 4

19 STD-553 SCREW, 6/32 x1/2 long, rd. hd. 4

20 AN365-632A NUT, 6/32 self-locking 4

21 lLW-16266-25-50 CLAMP 1

22 76734 ZIP STRAP 2

23 1182-87 SPARK PLUG, (Champion REM-37BY) shielded 8

1 M-1985-48 LEAD ASSY., Replacement top bottom leads AR

Replacement lead assemblies have spark plug terminal end assembled and are shipped with necessary parts to complete magneto end assemblyafter being cut to proper length.

NOTE

The above spark plugs are those used in current production only; this list does not include additional spark plugs that

are approved for use in these engines. See latest edition of Service Instruction No. 1042 for complete listing of all ap-proved spark plugs.

4-1

L~IAVCO LYCOM I NG O-235-P2A PARTS CATALOG

~IC)r ’?c,i---~

8 ~015i(7I::

107i/ i

~CIM

o

2i

5 ’3

i15 19

i´•´•lo~ B2O

/16

711

LEAD ASSY.

M-1985-48

Figure 19. MAGNETOS, DRIVES, HARNESSES AND SPARK PLUGS

4-2

LYCOIVIING 0-235-P2A PARTS CATALOG


STARTER MOTOR AND ATTACHING PARTS

FIG. QUANTITY

REF. PART PER


1 76210 STARTER, 12 volt, 10/12 pitch pinion (MZ-4204) 1



4 STD-1410 NUT, 5/16-18 plain 4

5-1

~I’AVCO I vnOMING 0-235-020 PARTS CATALOG

~3/

j~5 L:

a o

8 ~2

Figure 20. STARTER MOTOR AND ATTACHING PARTS

5-2

rMAVeO LYCOMING O-235-P2A PARTS CATALOG


OIL SUMP ASSEMBLY AND OIL SUCTION SCREEN



1 LW-1 3353 GASKET, Oil sump 1

2 LW-15688 SUMP ASSY., Oil 1

3 61376 CONNECTION, Intake pipe, front 2

4 61377 CONNECTION, Intake pipe, rear 2

5 250-12 STUD, 1/4-20 x 1-1/2 long 4

6 STD-551 PLUG, 1/2-14 NPT, so. hd. 1

7 STD-B WASHER, 1/4 plain 32


9 LW-25-0.94 BOLT, 1/4-20 x 15/16 long, hex, head 18

10 STD-1411 NUT, 1/4-20 plain 14

11 160820 GASKET, Oil suction tube flange 1

12 61381 TUBE ASSY., Oil suction 1

13 STD-1227 WASHER, 1/4 plain, copper 2

14 STD-1433 BOLT, 1/4-20 x 1-1/2 long, hex. hd., drilled end 2

15 ISTD-8 WASHER, 1/4 plain (max. 4) AR

16 STD-1409 NUT, 1/4-20 slotted shear 2

17 STD-68 PIN, Cotter, 1/16x1/21ong 2

18 61378 SCREEN, Oil suction 1

19 STD-1045 GASKET, 1-1/4 I.D, x 1-1/2 O.D. x 3/32 annular 1

20 1 61358 PLUG, 1-1/2x1-1/4-12, hex, hd. 1

6-1

I vr´•OR/IING 0-235-P2A PARTS CATALOG

2

10

16

17

o

a,, -f--

11 4~O

15I’ j!ii

o

AQ_1/Q 1D :g

liT)ii I~7

9-/

´•´•."g i,

19

Figure 21. OIL SUMP ASSEMBLY AND OIL SUCTION SCREEN

6-2

I VCOIVIING 0-235-P2A PARTS CATALOG


INTAKE PIPE ASSEMBLY

FIG. QUANTITYREF. PART PER


1 LW-16728 PIPE, Intake cyls. nos. 1 2 2

2 LW-16730 PIPE, Intake cyl, no. 3 1

3 LW-16729 PIPE, Intake cyl. no. 4 1

4 STD-1196 HOSE, 1-1/2 I.D. x 1-7/8 O.D. x 1-1/2 long 4

5 LW-1 5592-8-28 CLAMP, Hose 8

6 71973 GASKET, 2 bolt flange, 1-3/4 I.D. 4

7 74360 FLANGE, Intake pipe, upper 4


9 STD-1 60 WASHER, 1/4 lock, internal lock 8

10 LW-25-1.25 BOLT, 1/4-20 x 1-1/4 long, hex. hd. 8

6-3

~AVCe3 I VCOMING O-235-P2A PARTS CATALOG

i~----

IY1 r8

7

1-I10~1 ii k~/

B-/4-/

Figure 22. INTAKE PIPE ASSEMBLY

6-4

I VCONIING 0-235-P2A PARTS CATALOG


CARBURETOR ASSEMBLY

FIG. QUANTITY

REF. PART PER


1 60592 GASKET, Carburetor 1

2 LW-16073 CARBURETOR, Marvel-Schebler, MA-3PA (10-5220) 1



5 STD-1411 NUI, 1/4-20 plain 4

6-5

I VCOR/IING 0-235-P2A PARTS CATALOG

-1

I‘‘‘: c

Ic

11

clcl

1)r/ o

cj o

;II;I

rY

~3 I

I,´•~:6,

o 0‘

u\e,c

E 1\IZ*

InN

5

Figure 23. CARBURETOR ASSEMBLY

6-6



PRIMING SYSTEM

FIG. QUANTITY

REF. PART PER


1 LW-12098-1-170 TUBE ASSY., Primer cylinder no. 2 1



4 LW-12098-0-100 TUBE ASSY., Primer, intermediate 1

5 LW-16266-25-13 CLAMP 3

6 LW-18959-150-25 CLAMP, 1-1/2 I.D. with 1/4 dia. offset 3

7 STD-553 SCREW, No. 6-32 x1/2 long, rd. hd. 3

8 AN365-632A NUT, No. 6-32 self-locking 3

9 STD-853 TEE, Union, 1/8 tube 1

10 LW-18071 TEE, Union, 1/8 tube 1

11 74225 NIPPLE ASSY., Primer 3

12 1102* PLUG, 1/8 NPT, Alien head 1

Assemble in cylinder head.

6-7

O I VCOR/I ING 0-235-P2A PARTS CATALOG

31I I I

~s

1 31 7~8

\41’;8 9 ~-6

4

10s 5

Figure 24. PRIMING SYSTEM

6-8

I Y~ONIING 0-235-P2A PARTS CATALOG

SERVICE KIT SECTION

SEAL AND GASKET SET

WIDE CYLINDER FLANGE MODELS


61499-1 SEAL AND GASKET SET 1

STD-111 GASKET 1

STD-2217 SEAL, Oil 1



8313 GASKET, Vac. pump 2

60096 GASKET, Fuel pump 1

60592 GASKET, Carb. 1

60820 GASKET, Oil suction tube flange 1

LW-18639 LOCKPLATE, Crankshaft gear 1

LW-14260 SEAL, Tach. shaft 1

61173 GASKET, Oil press. hsg. 1

61183 GASKET, Accy. adapter 1

61523 CONTAINER 1

61531 GASKET, Hydraulic valve 1

62224 GASKET, Mag. adapter 3


LW-19296 GASKET, Exhaust flange 4

68315 GASKET, Accy. dr, adapter 1

LW-13353 GASKET, Oil sump 1

71973 GASKET, Intake flange 4

72053 GASKET, Gov. drive 1

72059 GASKET 1

72078 LOCKPLATE, Cam gear 2

72091 RING, Oil seal 8

73383 LOCKPLATE 1

73817 LOCKPLATE, Camshaft idler gear shaft 2

73818 GASKET, Accy. hsg. 1




76940 SEAL, Crankshaft oil 1

LW-13792 SEAL, Crankshaft oil 1

LW-12681 GASKET, Mag. 2

LW-12795 GASKET 1

LW-11632 RING, Oil seal 6

62869 RING, Cyl. base 4

LW-12040 TOP OVERHAUL GASKET SET 1

62869 SEAL, Cylinder base 4


71973 GASKET, Intake, 2 bolt flange 4


7-1

I vr.OlVIING 0-235-P2A PARTS CATALOG

SERVICE KIT SECTION

CYLINDER, PISTON AND RING KIT

WIDE CYLINDER FLANGE MODELS



STD-587 NUT, 9116-18 x 5/32 thick 2

STD-1215 BOLT 2



60009 KEY, Valve 4



LW-13320 SEAT, Valve spring, inner 2

61252 SEAT, Valve spring, outer 2




71195 BOX, Set-up 1





78864 RING, Piston, oil regulator 1


LW-13623 PISTON 1








7-2


NUMERICAL INDEX


AN365-632A Nut 4-1 LW-1 63045-6 Magneto 4-1

AN365-632A Nut 6-7 LW-16354 Crankcase Assy. 1-1

AN500-41 6-12 Screw 4-1 LW-16699 Seat 3-3

AN500A-41 6-10 Screw 4-1 LW-16728 Pipe 6-3

AN6-21 Bolt 1-11 LW-16729 Pipe 6-3

AN6-34A Bolt 1-11 LW-16730 Pipe 6-3

LW-1 0077 Seat 3-7 LW-1 8071 Tee 6-7

LW-11622 Stud 1-1 LW-18109 Impeller 2-3

LW-11623 Stud 1-1 LW-18110 Impeller Assy. 2-3

LW-11625 Plug 3-1 LW-18290 Cylinder Assy. 3-3

LW-11626 Guide 3-3 LW-18639 Lockplate 1-5

LW-11795 Spring 3-7 LW-18661 Seal 3-7

LW-11800 Spring 3-7 LW-18667 Pin 1-9

LW-1 1 900 Seat 3-3 LW-1 89 59-1 50-2 5 Clamp 4-1

LW-1 1 901 Valve 3-7 LW-1 89 59-1 50-2 5 Clamp 6-7

LW-12044 Housing Assy. 2-1 LW-19034 Valve 3-7

LW-12098-0-100 Tube Assy. 6-7 LW-19296 Gasket 3-5

LW-12098-1-116 Tube Assy. 6-7 LW-25-0.94 Bolt 2-3



LW-12186 Nut 3-1 LW-25-1.50 Bolt 1-11

LW-12695 Crankshaft Assy. 1-5 LW-25S1.50 Bolt 1-11

LW-1 2706 Adapter 4-1 LW-25-1.75 Bolt 1-11

LW-1 2795 Gasket 2-11 LW-25-2.00 Bolt 2-3

LW-12892 Thrust Button 3-5 LW-51360-54 Magneto 4-1

LW-1 2999 Plate 2-11 LW-52305-1 Kit 4-1

LW-13215 Oil Filter 2-11 LW-M-2375 Plate 4-1

LW-13303 Hook 3-9 LW-M-2403 Harness Assy. 4-1

LW-13304 Baffle Assy. 3-9 LW-M-2404 Harness Assy. 4-1

LW-13320 Seat 3-7 M-1985-48 Lead Assy. 4-1

LW-13353 Gasket 6-1 MS20822-6 Elbow 2-5

LW-1 3445 Pin 3-1 STD-8 Washer 1-11

LW-13623 Piston 3-1 STD-8 Washer 2-3


LW-13790 Shaft 3-5 STD-8 Washer 2-11

LW-13792 Seal 1-7 STD-8 Washer 4-1

LW-1 3884 Bearing 1-7 STD-8 Washer 6-1

LW-13923 Bushing 3-1 STD-8 Washer 6-3

LW-1 4060 Clip 4-1 STD-8 Washer 6-5

LW-1 4260 Seal 2-3 STD-33 Washer 1-11

LW-14781 Gage Assy. 1-3 STD-33 Washer 2-9

LW-1 5472 Fuel Pump 2-9 STD-35 Washer 2-3

LW-1 5592-5-05 Clamp 3-9 STD-35 Washer 2-5

LW-1 5592-8-28 Clamp 6-3 STD-35 Washer 2-7

LW-15688 Sump Assy. 6-1 STD-35 Washer 3-5

LW-157209 Kit 4-1 STD-35 Washer 5-1

LW-1 6073 Carburetor 6-5 STD-68 Pin 6-1

LW-1 6266-2 5-1 3 Clamp 6-7 STD-1 60 Washer 1-11

LW-1 6266-2 5-38 Clamp 2-5 STD-1 60 Washer 2-3

LW-1 62 66-2 5-50 Clamp 4-1 STD-1 60 Washer 2-10

8-1

~IAVCO LYCOMING O-235-P2A PARTS CATALOG



STD-1 60 Washer 2-11 STD-1411 Nut 6-5STD-1 60 Washer 4-1 STD-1 420 Nut 2-3STD-1 60 Washer 6-1 STD-1 433 Bolt 6-1STD-1 60 Washer 6-3 STD-1 727 Washer 4-1STD-1 60 Washer 6-5 STD-1 774 Pin 2-7STD-251 Washer 3-9 STD-1 774 Pin 2-10STD-294 Gasket 2-11 STD-1 838 Bolt 2-5STD-425 Washer 1-7 STD-1856 Screw 2-11STD-475 Washer 2-5 STD-1882 Screw 2-9STD-475 Washer 2-7 STD-1925 Screw 3-5STD-475 Washer 3-5 STD-1 930 Hose 2-5STD-475 Washer 4-1 STD-21 06 Nut 3-5STD-475 Washer 5-1 STD-21 80 Hose 3-9STD-514 Dowel 1-1 STD-2213 Screw 1-5STD-551 Plug 6-1 STD-2217 Seal 2-10STD-553 Screw 4-1 250-10 Stud 2-11STD-553 Screw 6-7 25(=-12 Stud 6-1STD-557 Dowel 1-1 25(3-22 Stud 2-1STD-587 Nut 3-5 310-12 Stud 1-1STD-596 Nut 1-11 31C-12 Stud 2-1STD-665 Screw 3-9 310-12 Stud 3-3STD-678 Washer 1-11 31C-16 Stud 2-7STD-684 Nipple 3-9 31C-19 Stud 2-1STD-700 Elbow 3-3 3100-17 Stud 2-1STD-705 Bolt 1-9 38-13 Stud 1-1STD-783 Plug 2-1 44-13 Stud 1-1STD-784 ’Plug 2-1 3838 Nut 3-5STD-784 Plug 2-11 10288 Ball 1-7STD-853 Tee 6-7 1102 Plug 1-1STD-872 Nut 1-11 1102 Plug 2-1STD-1 045 Gasket 1-7 1102 Plug 2-7STD-1045 Gasket 6-1 1102 Plug 6-7STD-1065 Dowel 1-5 1182-87 Spark Plug 4-1STD-1111 Elbow 1-1 8313 Gasket 2-10STD-1196 Hose 6-3 45530 Ring 1-9STD-1211 Plug 1-5 60009 Key 3-7STD-1221 Ring 2-7 60096 Gasket 2-9STD-1227 Washer 6-1 60398 Bushing 3-5STD-1 409 Nut 1-11 60430 Cover 2-10STD-1 409 Nut 6-1 60592 Gasket 6-5SID-1410 Nut 2-7 60803 Strap 1-11STD-1410 Nut 3-5 60814 Bushing 1-5STD-’IL~10 Nut 4-1 60820 Gasket 6-1STD-1410 Nut 5-1 60821 Tube Assy. 3-9STD-1411 Nut 1-11 60831 Rocker Assy. 3-5STD-1411 Nut 2-3 60882 Gear 1-5STD-1411 Nut 2-10 60890 Tube Assy. 3-9STD-1411 Nut 2-11 60903 Tube 3-7STD-1411 Nut 4-1 60928 Tube Assy. 3-9STD-1411 Nut 6-1 61084 Spring 1-7

8-2

L~CI’AVCO LYCOMING O-235-P2A PARTS CATALOG



61098 Adapter Assy. 2-10 72059 Gasket 1-3

61151 Shaft 1-9 72091 Ring 1-7

61155 Gear 1-5 72378 Cover 2-7

61163 Gear 4-1 72844 Plug 1-3

61174 Shaft 2-3 72970 Gear Assy. 2-10

61175 Adapter 2-1 73757 Bushing 1-5

61183 Gasket 2-10 73806 Rod Assy. 3-5

61247 Cover 3-5 73807 Screw 3-5

61252 Seat 3-7 73817 Lockpiate 1-9

61260 Flange 3-5 73818 Gasket 2-1

61358 Plug 6-1 74065 Ring 1-3

61376 Connection 6-1 74070 Elbow 2-5

61377 Connection 6-1 74225 Nipple Assy. 6-7

61378 Screen 6-1 74360 Flange 6-3

61381 Tube Assy. 6-1 74996 Gear Assy. 1-9

61400 Stud 2-1 75072 Gear Assy. 1-9

61510 Plug 1-5 75153 Adapter Assy. 2-7

61544 Plunger 1-9 76165 Clip 2-5

61665 Gear 4-1 75167 Tube Assy. 2-5

61681 Guide 3-3 75706 Camshaft 1-5

62224 Gasket 4-1 75708 Shaft Assy. 1-9

62417 Plug 2-11 75767 Tube 1-3

62869 Ring 3-5 75906 Gasket 3-5

65614 Plug 3-9 75944 Valve Assy. 2-11

66796 Insert 3-3 76210 Starter 5-1

68315 Gasket 2-7 76510 Gasket 2-11

68317 Shaftgear 2-7 76529 Plug 1-7

68763 Bearing 1-7 76734 Zip Strap 4-1

69373 Bearing 3-1 77309 Bushing 1-9

69796 Dowel 1-1 77852 Base Assy. 2-11

71105 Body 1-7 78027 Bolt 3-1

71596 Washer 2-7 78030 Rod Assy. 3-1

71596 Washer 2-10 78531 Body Assy. 2-3

71611 Retainer 3-9 78862 Ring 3-1

71973 Gasket 6-3 78864 Ring 3-1

72053 Gasket 2-7

8-3

0 235 pc 302 1 parts catalog

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