High crankcase pressure causes oil to blow out the breather. But it can also be caused by fuel dilution of the oil, from diesel fuel getting into the oil, Does the oil smell of fuel, or seem extremely thin?
Piston blow by or worn rings or valve stems. Anything that lets the combustion enter the crankcase. And the crankcase breather needs to be clean and working.
It seems excessive for the number of hours, but it can happen. Boats typically have no air filters, so any dust/debris, or other contaminates can cause engine wear.
No, just watch the oil level, and that will give you a chance to monitor the oil consumption. Some engines improve if they are run hard and get up to operating temperature. Running at lite load and idling around, can let oil be blown from breather and exhaust.
no, that should be enough to keep it from slobbering. Is it running at 180 degrees or higher?
Celcus, that should be fine, 185 F. Right what it should be.
OK! Thanks for the reply!