Propeller Selection - Yamaha VZ225C Owner's Manual

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EMU01395

PROPELLER SELECTION

The performance of your outboard motor
will be critically affected by your choice of
propeller, as an incorrect choice could
adversely affect performance and could
also seriously damage the motor. Engine
speed depends on the propeller size and
boat load. If engine speed is too high or too
low for good engine performance, this will
have an adverse effect on the engine.
Yamaha outboard motors are fitted with pro-
pellers chosen to perform well over a range
of applications, but there may be uses
where a propeller with a different pitch
would be more appropriate. For a greater
operating load, a smaller-pitch propeller is
more suitable as it enables the correct
engine speed to be maintained. Conversely,
a larger-pitch propeller is more suitable for a
smaller operating load.
Yamaha dealers stock a range of propellers,
and can advise you and install a propeller
on your outboard that is best suited to your
application.
NOTE:
At full throttle and under a maximum boat
load, the engine's rpm should be within the
upper half of the full throttle operating
range, as listed in "SPECIFICATIONS" on
page 4-1. Select a propeller which fulfills
this requirement.
If operating under conditions which allow
the engine's rpm to rise above the maxi-
mum recommended range (such as light
boat loads), reduce the throttle setting to
maintain the rpm in the proper operating
range.
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