Parsun F2.6HP, Installation & Operation Manual

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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. The outboard motor is fitted with propellers chosen to
perform well over a range of applications, but there maybe uses where
a propeller with a different pitch would be more appropriate.

For a greater boat load and a low engine speed, a smaller-pitch
propeller is more suitable. Conversely, a large-pitch propeller is more
suitable for a smaller operating load as it enables the correct engine
speed to be maintained.