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    Merc 3.7 Coolant in oil and blowing oil out breather

    Hello All. I have the famous Merc 3.7 Compression 150, 153, 155, 180 Yea All good. The issue is under load it is mixing coolant with the oil then blowing it out the beather vent. Inside the valve cover is a milk shake. I thought Blown head gasket, so I took the head off and can find no...
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    Merc 3.7 OEM Head Gaskets

    Just rebuilt a 3.7 with Siera gaskets that are already weeping coolant from the head on the exhaust side. I want to replace with the Mercuriser gasket. Anyone know where I can find the "Real" mercruiser head gasket? I have read that the OEM gasket has beads of sealant to prevent this. True/...
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    Merc 3.7 Unique Coolant Leak

    OK, So I replace the entire Head with a rebuilt one. New gaskets and the whole deal. It runs Great now. It appears that a previous owner fixed the coolant leak on the cam shaft. No Prolem there. So here is the Deal. Part of this is my own stupidity... Im sure everyone is familiar with...
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    Mercruiser 3.7 Head Compatability

    Hay gang. I have a merc 3.7 We all know the stories about blown head gaskets. Yea I got that. Exhaust gasses were pressurizing the coolant and we all know the reset. So here is my question. The head is not in great shape, The valves on #4 are leaking bad (karosene test, Fluid runs right...
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