I had the over revved Mercruiser 228, which locked up the lower unit of my outdrive. That problem has been fixed by installing a outdrive - well new to me - used one that purchased and appears in good shape. Installation went pretty good - difficult getting it in the last 1/2 inch, but it works fine. Shifts well and appears to be running well both forward and reverse. Only problem - maybe unrelated - My steering is locked and I cannot get it to turn either direction. Any chance this is related? When I launched the boat last spring the steering was stuck and it finally broke free and was fine. Boat hasn't been used for only 8 weeks since then.