I guess I dont understand I have been talking with other people around here about using one of these motors in this boat.... The boat weighs less than my HPI Savage (a 1/8 scale monster truck) which is where these motors came from and they have enough power to make it flip over backwards so I figured that it would be enough power for this boat. The biggest thing that they are worried about is cavitation since these are high RPM motors. O.S. recently took one of their truck motors as put a marine head on it and they claim that it is a rocket. I was hoping that maybe this might work for my boat. You seem to be very knowledgeable about boats so what kind of prop might I need or should I try with this boat and motor. If I cant find a marine motor in my price range these are what I will be using. I really appriciate your help.. Thanks sorry if I am annoying