I have a 24ft Cobalt 2004 with Volvo Penta Duo Prop's, size F6. The boat had a 350 cubic inch 270 hp (blew a piston). I am putting in a 450 HP 454. I know that I will be under prop'ed.
I'd like to know if someone could recommend (best guess) at what to try first. F7 or F8?
Trying to...
