fishsmith
Should go to your owners manual That should tell you what your recmmended RPM range should be. It is crucial for todays motors to be running around the manafactures WOT.
On my new motor my wot range is 5600-- 5900rpms These new motors are made to run in the high rpm range My boat does top end 39kts. At 4000rpms my boat crusies at 24 kts. Your rpms will also very with how many people or how much weight is on board.
Go to
www.theoutboardwizard.bizhosting.com Look to the left of screen and you will see HOW TO CHOOSE THE CORRECT PROPELLER.
Good luck.