Advertisement
GB
EMB80110
PROPELLER SELECTION
The performance of your outboard motor
will be critically affected by your choice of
propeller, for an incorrect one could
adversely affect performance and could
seriously damage the motor. The engine
speed depends on the propeller size and
the boat load. If the engine speed is too
high or too low for good engine perfor-
mance, this will have an adverse effect on
the engine.
Yamaha outboard motors are fitted with
propellers chosen to perform well over a
range of applications, but there may be
uses where a propeller with a different
pitch would be better. For a greater oper-
ating load, a smaller-pitch propeller is
more suitable as it enables the correct
engine speed to be maintained. Converse-
ly, a larger-pitch propeller is more suit-
able for a smaller operating load.
Yamaha dealers stock a range of pro-
pellers, and can advise you and install a
propeller on your outboard that is best
suited to your application.
NOTE:
Select a propeller which will allow the
engine to reach the middle or upper half
of the operating range at full throttle with
the maximum boat load. If operating con-
ditions such as light boat loads then allow
the engine rpm to rise above the maxi-
mum recommended range, reduce the
throttle setting to maintain the engine in
the proper operating range.
1-6
Advertisement
Chapters
