Recently bought 95 29 Scarab 502 mpi. Not sure of drive ratio, assuming 1.5 . Spinning a Br 1 24P 4 Blade at 4500 RPM. Can squeeze 58 on gps with me and my two little guys in the boat. Was reading some past forums and some guys are claiming low 60's. Any suggestions on props or power adders. Preferably don't want to go into the motor.

Would appricate any suggestions