Original prop is fairly shot.
I rang up Ribcraft and they recommended going to a 15. This is a fairly light boat remember, 60HP 2 stroke, single console, on deck tank and no a frame, it is however antifouled.
I bought a brand new 15" prop from the local dealer yesterday and went out, one up with very little fuel and trimmed out it revs to 6000rpm at WOT and a max speed of 33 knots over two runs (GPS).
I also went out 3 up with 30 litres of fuel a wakeboard and loads of other tat,
it maxed out at 28 knots but still pulled 5800RPM.
Cruising at 25 knots was at 5200 rpmish so abit high for my liking still.
Maybe its because I am not used to having a rev counter and ignorance is bliss?
Perhaps it wants a 16"? Peak power on this outboard is between 5 and 6000 depending on where you read.
It didn't exactly feel urgent when 3 up either, kind of like the last 2000rpm were just revs.
After my SR4/ 50HP this boat is abit of a dissappointment, the SR4 you really had to 'drive' and if you got it wrong it would try and kill you, I reckon you could make a cheese sandwich while reading the newspaper on this one at WOT!