Step 1 - Determining the proper pitch for your propeller
What is pitch?
Pitch is the theoretical distance, in inches, that a boat
travels forward during one revolution of the propeller.
How do I determine the pitch that’s right for my engine?
A. The propeller must allow the boat’s engine to run
within the manufacturer’s recommended rpm band at full throttle with the
boat carrying a typical load.
B. If your engine can run in the manufacturer’s specified
rpm range at Wide Open Throttle (WOT), your current propeller is about the
C. However, if your engine can’t reach its maximum
recommended rpm at full throttle, choose a propeller with a lower pitch. If
the engine exceeds the maximum recommended rpm at full throttle, select a prop with a higher pitch.
D. The rule of thumb is for every inch of pitch increased
you sacrifice about 150-200 rpm’s. The same goes for every inch decreased in
pitch you gain about 150-200 rpm’s.
Step 2 - How Do I Choose Between Stainless Steel and Aluminum?
While both can give you great performance, stainless steel will take more
punishment. Naturally, stainless steel costs a few dollars more, but it’s
worth it when it comes to longer lasting durability.