Page 7 - Yamaha Zubehör Aussenbordmotoren 2017

Propellers

Propellers and Propeller Accessories RAKE Rake
Rake is the angle of the blade in relation to the propeller’s barrel, or centre, and is expressed in
Rake is the angle of the blades in relation to the propeller’s barrel, or
degrees. A high rake propeller is best suited to applications where the engine is mounted high,
center, and is expressed in degrees. A high rake propeller is best
suited for high engine mount applications by helping reduce
to help reduce ventilation and increase bow lift. However, too much rake can strain the engine,
ventilation and increasing bow lift. Too much rake, however, strains
decrease hole shot and produce negative performance and handling results. A propeller with a low
the engine, decreases hole shot and can produce negative
performance and handling results. A propeller with a low rake angle
rake angle will cause less strain on the engine, resulting in potentially better hole shot and higher
will cause less strain on the engine, resulting in potentially better
hole shot and higher WOT operating rpm.
operating rpm at W-O-T.
SDS - SHIFT DAMPENER SYSTEM
Reducing the annoying shift shock and noise normally associated with moving between gears,
Yamaha’s unique Shift Dampening System (SDS) uses a splined aft washer and a splined rubber hub
to absorb noise and vibration. This carefully engineered solution brings smoother, quieter gear
shifts.

PROPELLER INFORMATION
THE PROPELLER MAKES ALL THE DIFFERENCE.
Propeller 6EK_Damper system_02
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 PROPELLER SERIES
performance.
Pitch
Pitch is the distance (in inches) a particular prop would theoretically 25 Pitch - 5200 RPM PITCH ALUMINUM/PLASTIC SERIES
travel in one full revolution, as if traveling through a solid. A lower 23 Pitch - 5600 RPM Pitch is the 'theoretical' distance (in inches) a propeller would travel in one full revolution, if it were
pitch will have better hole shot and “pushing power” but a lower top 21 Pitch - 6000 RPM Offering Yamaha design, quality and performance in a low-cost, lightweight propeller. this is a good
speed, while a higher pitch prop will provide less acceleration, but a travelling through solid matter. A prop with low pitch will deliver better acceleration/hole shot and all-around choice for your Yamaha outboard. Available in a wide variety of sizes and pitches for
greater potential for higher top speeds. The correct propeller will pushing power but a lower top speed, while a higher pitch prop will provide less thrust, but with Yamaha outboards between 2 and 225 horse power, in right-hand and select left-hand rotation.
allow your engine to reach the upper portion of the WOT range a higher top speed. The correct propeller will allow your engine to reach the upper portion of the
specied by the manufacturer with a normal-to-heavy load (without W-O-T range specified by the manufacturer with a normal-to-heavy load, but without exceeding it.
exceeding it). Each inch of pitch is equal to approximately 150 +/- 50 Each inch of pitch is equal to approximately 150 +/- 50 RPM.
RPM.

DIAMETER Diameter
Diameter means the total width of the “circle” at the blade tips as the propeller spins. Larger
Diameter means the total width of the “circle” at the blade tips as the
propeller spins. A larger diameter pushes more water and reaches
diameter props push more water and reach deeper down into the water, so they're typically used on DUAL THRUST SERIES
deeper into the water, so they’re typically used on large, heavy boats
large, heavy boats or ones with higher-placed engine mountings. A smaller diameter prop is usually
or ones with high engine mounting heights. A smaller diameter is
usually used on lighter weight boats, where the prop operates lower
used on lighter boats, where the prop operates closer to the surface of the water - or when you Specially designed for sailboats and other large-displacement craft, Yamaha’s patented Dual Thrust
in the water or when a gain in engine RPM is desired.
need a higher engine RPM. propellers are built to handle the job of pushing heavy loads through water. The hub is carefully
designed to redirect exhaust flow away from the blades, so Dual Thrust models cut through
“clean water” for higher efficiency and better acceleration. It is recommended that you contact an
NUMBER OF BLADES authorised Yamaha Dealer for advice on installation.
Number of Blades
Three-bladed propellers are the most common, oering good overall Three-bladed propellers are the most common, offering good overall performance, top speed, and
performance, top speed, and eciency for most applications. Four efficiency for most applications. While a four-bladed prop will provide increased bow and stern-lift
blades characteristically provide increased acceleration, enhanced
bow- and stern-lift, and reduced ventilation. However, four blades and reduce prop ventilation, this normally means more drag on the engine, resulting in lower top
typically mean more drag on the engine, resulting in lower top speeds and different handling characteristics.
speeds and dierent handling characteristics.
NEW TALON GP SERIES (WITH SDS)
BLADE GEOMETRY Designed for outboards from F70 to F130. Our new Talon – SDS propeller with our exclusive Shift
Dampener System (SDS™) brings a better top speed while offering a comfortable ride. The smooth
Blade Geometry
Blade geometry refers to the actual shape of the blade (or ear). By manipulating the blade’s shape, shifting and quiet, in-gear operation, even at trolling speeds, will be particularly beneficial on
diameter and pitch progression, different performance characteristics can be created for each Blade geometry refers to the actual shape of the blade (or ear). By
smaller, in-line outboards.
manipulating the blade’s shape, diameter and pitch progression,
different type and style of propeller. dierent performance characteristics are created for each dierent
type and style of propeller.
BLADE SURFACE AREA
Blade Surface Area
Blade surface area refers to the total surface of the blades. The more Blade surface area refers to the total surface of the blades. The greater the blade surface area, the
blade surface area a prop has the more water it pushes, for better more water the prop pushes, for better hole shot and increased planing efficiency. However, too
hole shot and increased planing eciency. Too much can create
signicantly more drag, however, potentially restricting engine RPM much blade area can create significantly more drag, potentially restricting engine RPM and causing
and causing negative boat-handling issues.
negative boat-handling issues. TALON SERIES (WITH SDS)
Specially engineered to reduce ventilation and enhance bow lift, Yamaha’s TALON aluminum
CUP 3-bladed propellers offer excellent holding power in turns, with enhanced “grip” for improved
control. In addition, they feature better overall performance and greater cruising efficiency in a
Cup is the small curved lip on the blade tip and/or trailing edge. Used in proper amounts, cup helps planed trim position than conventional 3-bladed aluminum propellers. TALON props are especially
Cup
reduce ventilation and propeller slippage, allowing for higher engine mounting and greater bow lift. Cup is the small curved lip on the blade tip and/or trailing edge. Used
effective on mid-sized deep- and mod-V aluminum boats, particularly in applications with the
in proper amounts, cup helps reduce ventilation and propeller
However, too much cup may cause excessive steering torque and bow lift - and limit the engine’s slippage, allowing for higher mounting heights and greater bow lift.
potential for aerated water beneath the boat. The new Yamaha SDS mechanism is integrated to
Too much cup, however, will cause excessive steering torque and
ability to develop and maintain proper RPM at a certain pitch. bow lift and limit the engine’s ability to develop and maintain proper
RPM at a certain pitch. reduce shifting vibration and noise. Can be used with standard spacer.
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