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    can blown head gasket cause low/no oil pressure? 1999 7.4 L

    ok so we have a cruiser with a 7.4 454 mercruiser (1999). we let a friend borrow it to go fishing. The next time we went to use it, it was hard for the starter to turn it over, checked the oil... no signs of water in the oil. I've flooded many engines to know it was hydo locked. so i opened the...
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