Get the engine at the right height, I have a 20 hp four stroke running a 9.25x10 and it will run 24 mph at about 750 lbs and fully loaded at 950 lbs 20 mph @5,800 RPM. The 20 hp is a dog, the 25 should be kiillng it. I know my redline is 6,100 and the power band hits about 5,500. This is on...