Page 6 - Yamaha Marine Zubehör 2016

Propellers and Propeller Accessories

PROPELLER INFORMATION

THE PROPELLER MAKES ALL THE DIFFERENCE.

If you haven’t tried one of Yamaha’s comprehensive range of propeller solutions, you’re not getting the most out of your outboard. In fact, the right
Yamaha propeller can maximize your outboard’s acceleration, top speed, fuel economy and lifespan, all while providing a quieter ride and better
handling. No matter what your application, there’s a genuine Yamaha propeller that can help you achieve peak performance.

cally 25 Pitch - 5200 RPM PITCH
wer 23 Pitch - 5600 RPM
top 21 Pitch - 6000 RPM Pitch is the 'theoretical' distance (in inches) a propeller would travel in one full revolution, if it were travelling
ut a through solid matter. A prop with low pitch will deliver better acceleration/hole shot and pushing power but

will a lower top speed, while a higher pitch prop will provide less thrust, but with a higher top speed. The correct
nge propeller will allow your engine to reach the upper portion of the W-O-T range specified by the manufacturer
hout with a normal-to-heavy load, but without exceeding it. Each inch of pitch is equal to approximately 150 +/- 50
- 50 RPM.

DIAMETER Diameter

Diameter means the total width of the “circle” at the blade tips as the prDoiapmeelteler mr esapnsinthse.toLtaalrwgidethr odf tihaem“cierctlee”art pthreobpladse tips as the
push more water and reach deeper down into the water, so they're typicdpaerloelppyeelrlueinrstseopdtinhseo. wAnaltaelrrag, serorgtdehiae,myh’reeetetayrppvicuyaslhlbyesuosmaedotrosenwolaarrtgeoer,nahneedasvryeabcohaetss
with higher-placed engine mountings. A smaller diameter prop is usuallyoruosneesdwiothnhilgihgehntgeinre bmoouanttisn,gwhehigehtrse. Atshmealleprrdoiapmeter is
engine RPM.usually used on lighter weight boats, where the prop operates lower
operates closer to the surface of the water - or when you need a higher
in the water or when a gain in engine RPM is desired.

good overall NUMBER OF BLADES
cations. Four
n, enhanced Three-bladed propellers are the most common, offering good overall performance, top speed, and efficiency
for most applications. While a four-bladed prop will provide increased bow and stern-lift and reduce prop
four blades ventilation, this normally means more drag on the engine, resulting in lower top speeds and different handling
n lower top characteristics.

BLADE GEOMETRY Blade geometry r
manipulating the
Blade geometry refers to the actual shape of the blade (or ear). By manipulating the blade’s shape, diameter di erent perform
and pitch progression, different performance characteristics can be created for each different type and style of type and style of
propeller.

blades. The more BLADE SURFACE AREA
ushes, for better
much can create Blade surface area refers to the total surface of the blades. The greater the blade surface area, the more water
ting engine RPM the prop pushes, for better hole shot and increased planing efficiency. However, too much blade area can create
significantly more drag, potentially restricting engine RPM and causing negative boat-handling issues.

CUP Cup is the small curved lip
in proper amounts, cup
Cup is the small curved lip on the blade tip and/or trailing edge. Used in proper amounts, cup helps reduce slippage, allowing for hig
ventilation and propeller slippage, allowing for higher engine mounting and greater bow lift. However, too Too much cup, however
much cup may cause excessive steering torque and bow lift - and limit the engine’s ability to develop and bow lift and limit the eng
maintain proper RPM at a certain pitch. RPM at a certain pitch.

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