WHAT PITCH PROP DO I NEED?
EFFECT OF PROP PITCH ON RPM
A pitch change can increase or decrease the RPM's and bring RPM's into the recommended range
A 2" INCREASE in pitch (For example from a 21pitch to a 23pitch) Typically results in a
DECREASE of approximately 300-400 RPM.
FIRST, DETERMINE MANUFACTURES RECOMMENDED RPM
Find the manufacture's recommended RPM range in the owner's manual or ask your dealer
TEST FOR MAXIMUM RPM
Using the existing propeller or a new propeller, make test runs to determine the maximum RPM
and boat speed. Vary the trim angle for optimum performance.
RPM HIGHER THAN RECOMMENDED
If the actual WOT RPM's are ABOVE the recommended RPM range, install the next LARGER
pitch propeller to DECREASE your WOT RPM. Re-test the WOT RPM.
RPM LOWER THAN RECOMMENDED
If the actual WOT RPM range is BELOW the recommended range, install the next SMALLER pitch
propeller to INCREASE your WOT RPM. Re-test the WOT RPM.
When you combine all these factors, you have the information you need to select the correct
propeller for maximum performance, safety, and fuel efficiency.
anything to add?