Originally Posted by dodl
I'd say, for a diving boat i use a lower pitch. No need for the few mph more top end speed. I never tried 4 blade, but a lot of people i talked to, said they have much better performance out of the hole, but with the downside of considerably lower top end...
have talked to some friends that went to a 4 blade, they where impressed by the cick and the low vibration, but in average the engine used more fuel and had a lower top speed.
do you have the instruction manual for your engine? if not you can view them here http://www.yamaha-motor.com/
under parts and service/view ovners manuals chpt 4 (i think) is about specs. rpm and so on
bought a new Hustler prop. ( 3blade) with seperate prop ring and boss same dim. as my original well used but ok propeller 13-1/4" X 19"
Installed it and drove happy to the sea, but that was not the least funny, the rpm dropped maby as mutch as 800rpm
so there you have it, not all propellers at the same dim. and pitch are performing the same
My new prop was far more efficient with less slip (sorry for me with wrong pitch).
Enyone hwo have a 13-1/4" x 17 in the garage ?? ( PN: HU1317AM)