I just got a 14ft center counsel. It came with a johnson 48spl. The motor has a very burn piston. The guy told me it was do to a miss pitched prop. I took the cover off and you can see the damage to the piston. The cylinder is in real good shape. I hand spun the fly wheel and the piston still move up and down very smoothly. Ho0w much damage could have been done. Is it worth fixing. If it is what kind of price range would it take to replace the piston