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    Won’t idle 3.0 Mercruiser

    Do you think it’s still the head gasket, or something worse?
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    Won’t idle 3.0 Mercruiser

    Compression was 90, 40, 15, 40….. I changed all the spark plugs and it won’t start at all now
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    Won’t idle 3.0 Mercruiser

    Compression results are 40 in two cylinders, 15 in one and 90 in the other
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    Won’t idle 3.0 Mercruiser

    I found the missing pieces and removed them, I will do a compression test later today, thank you
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    Won’t idle 3.0 Mercruiser

    I have a 1988 invader with a 3.0 Mercruiser engine in it. Okay so first time I took the boat out, was out for about a hour when I realized the boat was over heating. Like maxed out at 240, I believe it blew the valve cover gasket because it started bellowing White smoke, not from the exhaust...
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