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sosmarine · 01-21-2008, 08:16 PM

I don't see resealing the lower unit unless there is water getting in the lube.

When you changed the pump, did you just change the imp or did change the gaskets and wear plates too?

I would first stick it back in the water and run it. Watch the temp. If the temp does get to high then let run for a while. Then check oil again. The milky look you have now could just be residue from the first time. If the oil turns real milky again I would say it is either cracked block, head or blown head gasket. It could just be between a oil and water passage and not a cylinder. I had one do basically the same a few years ago on a 3.0 Sea Ray. Not that the boat matters.

01-21-2008, 08:16 PM	#4
sosmarine Senior Member Sailfish Join Date: Sep 2007 Location: Navarre/Town Center Posts: 1,856	RE: mercruiser help I don't see resealing the lower unit unless there is water getting in the lube. When you changed the pump, did you just change the imp or did change the gaskets and wear plates too? I would first stick it back in the water and run it. Watch the temp. If the temp does get to high then let run for a while. Then check oil again. The milky look you have now could just be residue from the first time. If the oil turns real milky again I would say it is either cracked block, head or blown head gasket. It could just be between a oil and water passage and not a cylinder. I had one do basically the same a few years ago on a 3.0 Sea Ray. Not that the boat matters.