12.5 b&S smokes bad then quits running

Discussion in 'Mechanic and Repair' started by ronnie2484, Apr 7, 2008.

  1. ronnie2484

    ronnie2484 LawnSite Member
    Messages: 2

    I have a 12.5 briggs and stratton in a small lawn tractor. It smokes really bad and only runs for a little while. I am thinking it is bad rings also I think I have some gas in my oil. any help would help greatly. thanks
  2. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    If you have any sign of fuel (smell/thinned oil) the carb should be taken apart and cleaned and most likely a new float needle valve installed, Also shake the float to see if any fuel has seeped inside.

    After the above clean/flush the fuel tank and lines install a new fuel filter then change the oil, Go with a straight weight oil instead of multi-weight.

    A new air filter and spark plug would complete a engine service.
  3. ronnie2484

    ronnie2484 LawnSite Member
    Messages: 2

    thanks that helps alot. I was hoping it was something simple.:cool2:

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