I have a 1965 Alacraft,15 foot, fiberglass walk through windshield boat with a 1988 mercury,60Hp motor.Im not real sure what the pitch is on the prop, however, im not sure if that is even my problem.I give the boat the gas and its like it wont plane.Ive tried all positions on my tilt trim and nothing seems to change.I ride looking at the sky.Anyone got any ideas from prop to a whale fin.