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  1. C

    mercruiser 4.3

    Bought a used boat. Did not water test. Stupid me. But, put in the water. Engine started fine. Ran at idle speed for 5 minutes. Went to 1/2 throttle. good. Went to 3/4th throttle, heard a knocking sounds. Brought back to idle. Went back to a dock. Now, it knocks loud at any rpm. There was oil in...
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