WRB,
I'm not looking to go fast. Just to get the max speed out of it that I can and get the RPM down a little. I'm going to get a Laser II 20 pitch I think. I've found a few people online with same boat that say they get 42mph at 5500 RPM with this prop. This would be 2-4 MPH than I'm getting now. Usually I get 38 mph but have gotten up to 40 on occasion. I don't really want to get into modifications to the motor. Thanks everyone for the input.