Onan Diesel Generator Blue Smoke at start
My Onan Diesel Generator gives blue smoke for about a minute when it starts. I don't recall this in the summer, but it is very noticeable with the winter weather (freezing and a bit below).
I know that blue smoke (called ash in the literature) comes from burning engine oil. And, on cars, if it smokes all the time, it is bad piston rings, but if only at the start, it is worn valve guides.
Is this line of reasoning the same with a diesel generator? My RV is new and the generator should be under warranty, so I want to know whether this is unusual and I should talk to Freightliner. The generator has almost 50 hours on it, and I'll change the oil this spring. I'm using it to keep my batteries up for the winter.
Gordon Sick, Calgary
2015 Berkshire 34QS
2005 Acura EL (aka Honda Civic)