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    Mercruiser 470 3.7 L Blow By issue Piston Removal In boat possible?

    We were sold a cl boat last summer and found out it has a severe blow by issue, did compression and #3 was 40lbs so pulled the head and found blown head gasket but now after pouring a quart of ATF on all 4 cylinders and seeing if we lost any oil in last 24 hrs we lost all the oil in # 3 draining...
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