P
E R F O R M A N C E
4–2
Propeller
The condition of your prop has a major influence on the performance of your boat. Your
engine(s) should be equipped with the best size prop for normal conditions. Unusual uses or
weight conditions may require special props. A damaged prop can affect your boat's top
speed, cause vibrations, create a sudden drop in RPMs or even increase fuel consumption.
Diameter = 14
Pitch = 14
Diameter and pitch are the two basic dimensions of a propeller. Diameter is the distance
across the circle made by the blade tips as the propeller rotates. Pitch is the theoretical (not
accounting for slippage) forward distance the propeller would move in one revolution. An
example of a propeller dimension would be 14 X 17 for a propeller having a diameter of 14”
and a pitch of 17”.
C A U T I O N
Stay within the engine manufacturer's maximum and minimum RPM ranges when replacing
props. This information is located in your engine manual.
!
Pitch
Diameter
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