I see you are turning your props out, we set a 34 scarab 3. props were turning out first, we swithched the drives around and spun them in and picked up 6 mph. That sure was cheap mph. Just a little food for thought, and i know all boats are different.

Well I just bent a rod and trashed 5 piston so im down for now but Ive seen 76 with a little more throttle to go the drives are trs I figure the motors are making around 580 hp a peace

Sometimes boating just sucks! Good luck.