[QUOTE=bigshrimpin;115427]You'd have to turn at least 5800+ rpm with a 19 pitch prop to see 50mph.
http://www.go-fast.com/Prop_Slip_Calculator.htm
That's not an easy thing to do, cause most 225's are big heavy 3.0L + motors. If you find a Yamaha 2.6L 225 or a excel or 220 special . QUOTE]
you must be joking? yamaha's are dogs compared to mercs and omc's brp's.