•Unbelievable bow lift and quick planing onoutboard-powered bass, flats or sport boats•Delivers superior handling and better controlin tight turns with reduced torque andsteering loads•For outboards 75 hp and up

•Ventilated for increased acceleration andunparalleled speed for large and heavy loads•Higher rake and bigger cup for betterhandling and lift•Large 14-5/8" diameter for high engineheight installations•For big, V-6 outboard-powered bass, walleye,bay and sport boats

•Delivers increased speed, better accelerationand unparalleled top-end performance•Excellent speed and handling,especially for stepped and cat hulls•For high-horsepower, high-drive-heightoutboards and Bravo One sterndrives

•Brings power, top speed and lift withincredible traction and acceleration•For V-6 outboards and Bravo One and TRSsterndrives, especially sport and offshore boats

•Improves acceleration and top speed on largerhigh-horsepower boats•For outboards 150 hp and higher, especiallyfor offshore fishing, bay and sport boats•For V-8 single, center-console Bravo One single, or dual and TRS sterndrives

•High-rake design for greater lift on15 –18 foot outboard- and 18–22 footAlpha sterndrive-powered boats•Thinner blades reduce drag and increasetop speed while improving handling•For outboards 75 hp and up andsterndrive sport boats 22 feet and under

•Excellent planing and top speeds for heavy,vee-bottom hulls•Standard with 1 1/4" hub kit for Sport Masterand Bravo One XZ/XR sterndrives•For high-horsepower, high-drive-heightoutboards and sterndrives

•Ultimate in hole shot for effortlessly pullingskiers or hauling to your favorite fishing hole•Pulls strong and smooth and offers great bowlift and handling, even in rough water•For outboards over 75 hp and Alpha,Bravo One and TRS sterndrives

•Delivers high-quality performance andacceleration in an affordable price range•Perfect for runabouts, ski boats and day cruisers•Delivers improved handling and better holding than a three-blade design•For V-6 outboards and Alpha sterndrives up to 250 hp

•Provides better acceleration, aggressive holdingand tremendous bow lift•For V-6 outboard and 3.0L–5.7L Alpha sterndrivewater ski, wakeboard and tubing boats•For single or twin 135–175 hp outboard-powered18 –24 foot center-consoles

•Performs well on outboards, Alpha sterndrives,inflatables and pontoons*•For all outboards and Alpha and Bravo Onesterndrives with up to 250 hp and top speedof less than 50 mph*New four-blade version available for Pontoons

•Stainless steel performance and value withincreased efficiency, strength and durabilityover aluminum•Precision handling and acceleration - betterthan most three-blade aluminum propellers•For outboards 25–250 hp and Alpha sterndrives

•Delivers enhanced mid- to top-range performance•Large blade area for maximum thrust – designed for better maneuverability and holding in turns•Perfect complement for Bravo Twosterndrive

•Twin counter-rotating stainless steel design –large-diameter forward and small-diameter aft propeller•Delivers unbelievable control and handling•Generates high-thrust production and improved operating efficiency while running smooth at high- and low-end speeds•Perfect complement for Bravo Three drive system

• Better acceleration and top speed • Thin blades and higher rake angles forincreased efficiency • Perfect for high-horsepower outboard-poweredoffshore boats • Stays hooked up; fewer blowouts while cornering • Built with exclusive X7 Alloy for ultimate strengthand durability

•Smaller four-blade stainless steel design•All the advantages of the Trophy Plus•Fast planing, top speeds and improvedhandling with reduced steering loads•Ideal for small flats, walleye or bass boats•For 30–60 hp outboards running 30–60 mph

Log on to: www.mercurymarine.comto utilize the Prop Selector.

Log on to: www.mercurymarine.comto learn more about propellers.

Log on to: www.mercurymarine.comto find a Demo Prop Dealer.

We offer the best selection of propellers to dial-in your boat's ultimate performance.

© 2006 Mercury Marine. All Rights ReservedPart #90-896279001 Published 2/06. Printed in U.S.A.

Log on to: www.mercurymarine.comto utilize the Prop Selector

or to find a Demo Prop Dealer.

Propeller TechnologyTo gain a better understanding of how propellers work, we have included some basic terminology. To learn more, visit our website: www.mercurymarine.com

DiameterDiameter is the distance across the circlemade by the blade tips as the propeller

rotates.

PitchPitch is the distance that a propeller would move in one revolution if it were moving through a soft solid, like a screw in wood.

When a propeller is identified as 13 3/4 x 21, it has a 13 3/4" (35 cm) diameter with 21" (53 cm) of pitch. Theoretically, this propeller would move forward 21" in one revolution.

• Adding 1" of propeller pitch will reduce wide-open throttleb y 150-200 RPM.• Subtracting 1" of propeller pitch will increase wide-open thro ttle by 150-200 RPM.• Four-blade propellers will generally run 50-100 RPM lessthan a three-blade propeller of the same pitch.

SkewA blade that is swept back versus a blade that is radially symmetrical in contour is said to have skew. Considerable skew (sweep back) is helpful in allowing a propeller to more easily shed weeds. Higher skew on a surfacing application reduces the pounding vibration of a propeller blade re-entering the water.

RakeIf the face of the blade is perpendicular to the propeller hub (Figure 1), the propeller has zero degree rake. As the blade slants back toward the aft end of the propeller, blade rake increases (Figure 2). With standard propellers, the rake angle varies from 5° to 20°. Basic propellers for outboard engines and stern drives commonly have around 15° of rake. Higher-raked (high-performance) propellers often have progressive rake which may go as high as 30° at the blade tip (Figure 3).

Rake is either flat (straight) as shown in Figures 1 and 2, or curved (progressive) as shown in Figure 3.

A higher rake angle generally improves the ability of the propeller to operate in a cavitating or ventilating situation, such as when the blades break the water's surface. With such surfacing operation, higher blade rake can better hold the water as it is being thrown off into the air by centrifugal force, and in doing so, creates more thrust than a similar but lower raked propeller. On lighter, faster boats, with a higher engine or drive transom height, higher rake often will increase performance by holding the bow of the boat higher, resulting in higher boat speed due to less hull drag.

However, with some very light, fast boats, higher rake can cause too much bow lift, making these boats more flighty or less stable, in which case a more moderately raked propeller would be a better choice.

CuppingWhen the trailing edge of the blade is formed or cast with an edge curl (away from the boat), it is said to have a cup.

SlipSlip is the most misunderstood of all propeller terms, probably because it sounds like something undesirable. Slip is not a measure of propeller efficiency. Rather, slip is the difference between actual and theoretical travel resulting from a necessary propeller blade angle of attack. For example, a 10" propeller actually advances only 8-1/2" in one revolution. Eight and one-half inches is 85% of 10", leaving a slip of 15%. If the blade had no angle of attack, there would be no slip; but, of course, there would be no positive and negative pressure created on the blades and, therefore, there would be no thrust.

VentilationVentilation occurs when air from the water's surface or exhaust gases from the exhaust outlet are drawn into the propeller blades.

Flo-Torq II Hub SystemFlo-Torq II is specially designed to resist slippage, yet still flex during engine shifting. Flo-Torq II is more flexible than competitive hub systems and thus minimizes stress on the engine, engine drive and propeller when the engine is shifted into gear. In addition, Flo-Torq II cushions and protects the drivetrain from most impacts. When large underwater obstructions are encountered, the Delrin® sleeve of the Flo-Torq II system is designed to "break away" following impact, ensuring that damage to the engine, engine drive and propeller is kept to a minimum. And better yet, the sleeve can easily be replaced by you! The Flo-Torq II system also provides unmatched corrosion protection, avoiding component 'fusing', which can make propeller changing nearly impossible.

With the Flo-Torq II system, Mercury Propellers become compatible with, and can increase the performance of, almost all marine engines, including:

• Mariner® • Force® • Evinrude® • Johnson® • Yamaha® • Honda® • Volvo® • OMC® • Suzuki® • Tohatsu® • Nissan®

Protection for your Lower Unit

13 3/4"

21"

13 3/4"

13"

Propeller withvery little skew

Propeller withconsiderablyskewed blades

Actual Pathof blade

TheoreticalPath of blade

1

0 degreerake

2flat rake

15o

3

curved(progressive) rake

30o

10o slip15%

1 revolution = 8 1/2" actual advance

1 revolution = 10" theoretical advance

• 30-percent stronger than conventional stainless steel• Four times more durable than conventional stainless steel• Allows prop designs that are impossible with conventionals tainless steel • Patent pending• Currently on select models

A revolutionary new alloy fromMercury that shatters the rulesof propeller design.

Most acceleration problems can be addressed using thefollowing venting options:

With PVS, you can make your engine run likea Mercury, no matter what power you run.

Problem: Boat is sluggish getting on plane.Solution: By using a large vent and allowing more air through, your engine's RPM get up to speed faster, and your boat levels off quicker.

Problem: Changes in altitude. Or pulling heavier loads.Solution: By experimenting, you can find the rightamount of ventilation that produces maximum propeller performance– no matter the altitude, load or temperature.

Problem: Too much ventilation is slowing you down. Solution: By sealing off the vent hole completely, your prop can now get the solid water it needs to propel through. Optimizing performance and fuel efficiency.

LARGE

SMALL MEDIUM

SOLID

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gearcasedamage

gettinghome safely

break-awaypoint

cushoinedshift-shock