Frank, a couple more things to add to your check list for diagnosing smoke at
cruising speed: One is poor fuel quality or gunk (water, diesel and algae) in
your tank. Changing fuel and replacing filters is an easy way to rule this out.
The second is a rusted exhaust mixer on Yanmar GM series eng
I agree on the black smoke due to poor combustion of the diesel fuel. However,
I doubt that the lubrication oil would enter the combustion chamber unless the
rings are badly worn. With only a few hundred hours on the engine they should
be as good as new. I once had an oil change and the guy p
Tom,
One thing you might try is to is to see what type of smoke you're
getting. Burning lubricating oil tends to be blue/white, which
indicates your might have excess oil splashed up from the crankcase to
the cylinder walls. Some splash is normal, that's the way the rings are
lubricated, b
Only time will tell. If it starts using a lot of oil you know that there is
damage to the engine. I would check the oil each time you go out to see if it
is burning oil. If the oil level does not change you were just burning off the
excess oil. BTW, how much did you over fill on the oil?
Fra
Minor
I can't remember where I heard it but as I understand it mid to low is
better than full. I guess these (Yanmar 3GM/HM) engines are more likely
to carry over oil into the combustion as the oil level goes up.
Same thing happens when you overfill cars and my lawnmower. My lawnmower
runs fin
Alera is my second C&C, but my first diesel. My prior 35MK 1 had an Atomic4.
I have been checking oil on my Yanmar about as often as I did on the A4, like
once a season. Last summer I learned the error of my ways. But I over
compensated for the low oil level and overfilled the engine.
Our en
