Buddy bought a Nitro with low hours. He fished a few times and now changed the oil and very milky and foamy. Refilled, ran 15 mins and changed oil and same. I think he did this again too. Mercury oil he is using is getting expensive. I assume he changed the filter each time but not sure. Runs fine. Plugs look normal and none are "steam cleaned" as might be expected with a blown head gasket. I told him a compression test might varify that. Any other way water or something else could be introduced to the crankcase oil? Ty

He did call a Mercury dealer and spoke to a Tech that is looking into it.