diameter

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…