I have a 1972 johnson 50 hp (50esl72c) that had a prop on it with 901F stamped on it. It's unknown if it is the original prop that came with motor. It has a 13 1/2" diameter. I'm hoping someone can tell me the pitch so I have a better idea of what to change to. Currently motor is on an old 15' Steury trihull (no the lightest boat) and needs a lower pitch prop. As of now I don't have a tachometer to give that info. Plan to add one soon hopefully.
