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    Mercruiser 3.0 Engine knocking noise

    I believe the noise started after I noticed water in the oil after overheating. I fixed the water issue. Is there internal damage because of water in the oil
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    Mercruiser 3.0 Engine knocking noise

    The mechanic did a compression check and 3 are at 120 and 1 is at 135
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    Mercruiser 3.0 Engine knocking noise

    Here is a picture of the rear engine mount bolt. Both sides look the same and it appears to be backed out. This side looks to be out farther than the other side. I'm guessing it shouldn't be like this?
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    Mercruiser 3.0 Engine knocking noise

    Thank you for all of the suggestions. It sounds like it's coming from the front of the motor. I have not tried to run it without the belt on but that was suggested by someone else so I will try that this weekend. I will also check the motor mounts as I have seen other posts about this causing...
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    Mercruiser 3.0 Engine knocking noise

    I have a knocking noise and can't determine where it's coming from. Little history - I had the lower unit impeller go bad and it over heated the engine. I pulled the head and had it checked because water was getting in the oil. Head checked out good and I replaced the head gasket of course...
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    Mercruiser 3.0 / 140 Engine Knock, Ticking Noise

    I have a knocking noise and can't determine where it's coming from. Little history - I had the lower unit impeller go bad and it over heated the engine. I pulled the head and had it checked because water was getting in the oil. Head checked out good and I replaced the head gasket of course...
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