Boston Whaler 20 Justice Series, Operation & Maintenance Manual

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2-17
Boat Operation Section 2
Reducing propeller pitch and diameter will increase
acceleration and load carrying capability, with a slight
decrease in top speed. It will also increase the
engine’s full-throttle RPM at a rate of about 150 RPM
per inch of pitch change.
Increasing propeller pitch and diameter will
decrease acceleration and might increase top speed.
It will also decrease the engine’s full-throttle RPM at a
rate of about 150 RPM per inch of pitch change.
If you are considering a propeller change, the type,
pitch, and diameter should be discussed with an
authorized outboard engine service dealer.
Refer to the engine operator’s manual for detailed
information about changing your propeller.