I have a 20' pontoon boat I rebuilt and I have a 1987 Classic 50 45hp mercury on it. I have no idea what size prop it should have. Any ideas to get me close?
the prop is a 14" pitch and it turned about 5300 on a 16' basstracker that it was on. I have not put the pontoon boat is the water yet. I guess i will check the rpm then on the pontoon.