I had a 96 22 Scarab with 330 HP 7.4L. 61-63 was the best I could get. I ran a 23P Mirage 3 blade that banged off the rev limiter at 4800 RPM when the load was light, then I switched to a 25P Mirage 3 blade and ran about 4550-4600 RPM. The 25P was maybe 1-2 MPH faster. If you are only turning 4250, something aint right.

thats were the rev limiter is set on a stock 330,

Is there any way to cancell the rev limiter?

Change to a msd , then you can dial in rev liniter, but with a stock 330 . it might not last higher rpms

in my 95 22' im turning a 25 mirage+ 5200 and 78 mph gps. thinking about getting a bravo around 27p see what that does. but not untill i do more tuning on the water