Generator Blowing Black Smoke
Here's another issue I'm having besides my furnace... :) My generator... an Onan Gold Marquis 5500, is blowing black smoke intermittently. It didn't run for the better part of six months because I...
Forum Discussion
TEXAS wrote:
After 55 years of working on engines. I have found.
Black smoke is caused by clogged air filter or to much fuel.
Blue smoke is from burning oil.
White smoke is from water vapor or a diesel starting in cold temps.
While this is true............
A tiny bit of oil burning can produce smoke that looks white.
A LOT of oil burning can produce black oily smoke for a short time until the plugs foul.
When it is producing black smoke, you have to feel and smell the resulting tailpipe residue to distinguish between too much fuel and too much oil.
