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    75 Mercruiser 140 over heating

    Have a problem with overheating so I am installing a new complete impeller repair kit. I also had a leak so the oil was milky. My question is do these kits have everything to stop the leak or will I have to get additional seals, etc? Also when I removed the stern drive I found a shutter...
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    Thumping Noise upon Starting Merc 140HP

    I'm new at this so I need advice. When I first start the engine it makes a thumping noise 5 or 6 times like the motor is vibrating against the hull. Is this normal or maybe a loose motor mount? Its a 1975 model and I have not idea if they were ever changed.
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    Evinrude 9.9 Compression

    Anyone know how much compression a 1985 Evinrude 9.9 should have. Mine reads about 80 on both cylinders and I think this is a little low.
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