This article is from the Boats FAQ, by John F. Hughes with numerous contributions by others.
GENERAL RULE OF PROP SELECTION: On a properly trimmed boat
a prop of the correct pitch and diameter will permit the motor to attain
it's maximum rated RPMs but NO MORE.
HOW TO BUY THE CORRECT PROP: The best method of prop
selection that I know of is to find a dealer that will let you try several
props with the understanding that you will buy the one that performs as
above. Of course it is also understood that if you ding a test prop you will
Contributed by hl.