[Howard Hill]

Good advice in the above posts. I also would be skeptical about the top end. My 20' is powered with a 150 EFI Yamaha and runs 43 mph with three adults and a full fishing load. The top end is just under 50 with a light load (1 adult) and 30lbs of fuel.

Additionally, The variable deadrise SeaCraft hull runs and rides better on top of the water, especially in a moderate chop, consequently you need enough motor to lift the hull out of the water and minimize the wetted surface.

Good luck with your search!