2006 PartyKraft 22', Yamaha F90 w/oem 13 1/4 diameter x17 pitch prop = 22-23 mph with a moderate load @ 5200 rpm
My SIL ran across a rocky shallow and destroyed the above prop. So I have been reading and researching a replacement that might give me more rpm. Everything I read says going down in pitch will gain rpm. Top rpm of the F90 is 6K, so there there is room for improvement.
So at a marina near the lake I found a Solas 13 1/2x15. Slapped it on and I got 19mph @4800
RPM...???? Entering my boat info into several prop calculators points to a 14x13 prop....so I hesitate on this as I think I will loose more speed and more rpm? So now I am confused and think I will just have the oem prop repaired......what am I missing here?