I have a 200 Johnson with a 4 blade Renegade prop and don't know the pitch ?? Only thing I can find on it is S10M . What does that mean or is there more writting somewhere I'm missing? Also what should I expect perform wise on a 20ft boat ? My top speed is 50mph with one person with prop set at 3 3/4" with manual jackplate that's is level on motor. Thanks!