Forum Discussion

drew21's avatar
drew21
Explorer
Jul 29, 2015

generator smoking

my onan generator started smoking (white) after running my air cond. for about an hour maybe a little longer
any idea why

8 Replies

  • its a gas engine the smoke (a lot ) for a few minuts ishut it down was from the exhuast air cooled and the oil is getting normaly discolored
  • Need to know what the generator is. Gas, diesel, water cooled, air cooled or what???
  • Gjac's avatar
    Gjac
    Explorer III
    You may have a leak in the eng and it is dripping on the hot muffler underneath.
  • Is it a gas generator? You don't have anything in your profile about your coach.
  • What color is very deluted oil? We are talking about an air cooled motor.
  • RoyB's avatar
    RoyB
    Explorer II
    I think it is the other way with gasoline engines being blueish white for OIL - black smoke for gasoline...

    Just checked google search about the different colors coming from the exhaust...

    FOR GASOLINE ENGINES
    Black exhaust smoke is an indication of a rich fuel condition.

    BLUE/GRAY exhaust smoke is an indication of oil burning in the combustion chamber.

    White exhaust smoke is an indication that coolant is burning in the combustion chamber.

    FOR DIESEL ENGINES
    Black smoke is the most common emitted from diesel engines and indicates incomplete combustion of the fuel.

    Blue smoke is caused by engine lubricating oil burning.

    White smoke is caused by raw, un-burnt fuel passing into the exhaust stream

    At least that is what a couple of GOOGLE SEARCHes says...



    Roy Ken
  • White smoke is gas. Check your oil level and also see if it smells like gas. Your float in your carb might be what is causing the gas in the oil.
  • Is it smoking from the exhaust or from the engine area?