I just bought this motor at a garage sale. Got it running after putting new plugs and impeller in. It runs great when in neutral but when I put it into gear it won't turn hardly any RPMs. I took the prop off and put the plastic cap on and it would turn that fine. Put the prop back on and cranked it up out of the water and it worked great. Put it back in the water and the problem was still there. Does anyone know where I could get a new prop or what size prop it takes? I think at some point in time some one stuck the wrong prop on this motor.