Hey,
Have an ongoing problem with my 2002 maxum that has a merc 305 CID v8 open water cooled in it. Last year while getting the boat ready for summer my oil change revealed about a cup of water which poured out first (oil hose which exits from the bilge)followed by milky oil. I had an over heat alarm go off once but the boat ran fine after, at the time I believed the sensor was faulty because it would not go off, had to unplug battery to get it to stop.
I replaced manifolds and risers after hearing these engines are bullet proof and very rarely blow a head gasket. I put about 20 hours on the boat this year, had to rebuild carb because it was flooding very badly and wouldn’t run right. Besides that 0 issues.
Pulled out boat this week and did a spark plug/oil change spark plugs all looked the same, black, not oily, not tan,not white, BLACK. The oil was sludge, milky thick sludge, oil filter was globbed at the top and below it was about 4 ounces of liquid.
compression perfect, exactly the same as the reads from last year in every cylinder.
any ideas? Is it possible I have gas in the oil and not water from the carbs flooding, had a buddy on the boat when it happened and he claimed he tried to start it for a solid 15 minutes so who knows how much worse he flooded it himself.
if not would bad water shutters do this? They looked old but functional when I did the manifolds.
Worse case head gasket....which is probably what this is.
Have an ongoing problem with my 2002 maxum that has a merc 305 CID v8 open water cooled in it. Last year while getting the boat ready for summer my oil change revealed about a cup of water which poured out first (oil hose which exits from the bilge)followed by milky oil. I had an over heat alarm go off once but the boat ran fine after, at the time I believed the sensor was faulty because it would not go off, had to unplug battery to get it to stop.
I replaced manifolds and risers after hearing these engines are bullet proof and very rarely blow a head gasket. I put about 20 hours on the boat this year, had to rebuild carb because it was flooding very badly and wouldn’t run right. Besides that 0 issues.
Pulled out boat this week and did a spark plug/oil change spark plugs all looked the same, black, not oily, not tan,not white, BLACK. The oil was sludge, milky thick sludge, oil filter was globbed at the top and below it was about 4 ounces of liquid.
compression perfect, exactly the same as the reads from last year in every cylinder.
any ideas? Is it possible I have gas in the oil and not water from the carbs flooding, had a buddy on the boat when it happened and he claimed he tried to start it for a solid 15 minutes so who knows how much worse he flooded it himself.
if not would bad water shutters do this? They looked old but functional when I did the manifolds.
Worse case head gasket....which is probably what this is.