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  1. #1

    Join Date
    Aug 2012
    Posts
    2
    Location
    California
    Mower
    Briggs & Stratton Quantum Power 4 HP 21" Cut

    Briggs & Stratton 4 HP Throwing Oil Out Of Muffler

    Model 12F702-0606-01 Code 9408095

    Has been in storage for years. Fired it up and lots of smoke came out of the muffler. It ran for a short while then died. Looked below the muffler and there was a small pool of dark oil. Checked the oil and it looks very clean. After several tries got the unit to fire up again. Same thing happened, lots of white smoke, oil dripping out of muffler, after several minutes I just shut it down.

    Someone suggested that the lawnmower may have been tipped. Not sure of that, I did not tip it. What can I do to try and clear out oil if it had been tipped?

    If tipping was not the cause of this problem, what else could it be? What can I do to troubleshoot or resolve this problem?

    Help please!

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  3. #2

    2,500 Post Club

    Join Date
    May 2010
    Posts
    2,583
    Location
    Illinois
    Mower
    kioti/rhino finish mower

    Re: Briggs & Stratton 4 HP Throwing Oil Out Of Muffler

    It just may be a case of the engine being stored slightly spark plug down, leading to oil seeping past rings while being stored. The best thing to do is tie the control bail if it has one, start the mower, go get a cold drink and a sandwich, come back in about 15 minutes, shut off mower, and wipe the oil off the deck, and you should be fine.
    ILLINOIS ENGINE, BEECHER CITY, IL
    BRIGGS AND STRATTON MST (MASTER SERVICE TECHNICIAN)
    Sales and Service for Dolmar, Poulan, Briggs and Stratton, Kohler, Lauson(Tecumseh, LCT), Generac, Brute.
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  4. #3

    Join Date
    Mar 2012
    Posts
    5,373
    Location
    Wisconsin
    Mower
    Toro

    Re: Briggs & Stratton 4 HP Throwing Oil Out Of Muffler

    Do not do what IL said in a garage, unless you want your better half on your back for the next month.

  5. #4

    Join Date
    Aug 2012
    Posts
    2
    Location
    California
    Mower
    Briggs & Stratton Quantum Power 4 HP 21" Cut

    Re: Briggs & Stratton 4 HP Throwing Oil Out Of Muffler

    Model 12F702-0606-01 Code 9408095
    Had been advised to let it run to burn off the oil, which I did while I proceeded to mow the back yard. Thought everything was okay. The next time I tried to start it, it fired up briefly, then it died rather rapidly. I tried it again, just a few sputters but nothing. I cannot even get it to fire now. Replaced the spark plug with one set to proper gap. Still nothing.
    What can I do to troubleshoot this unit?
    Also, does anyone know what the trick is to draining the oil?

  6. #5

    Join Date
    Mar 2012
    Posts
    5,373
    Location
    Wisconsin
    Mower
    Toro

    Re: Briggs & Stratton 4 HP Throwing Oil Out Of Muffler

    I would take the carb off and give it a good cleaning. Easiest way to change oil is to get it warm and then drain it out through the fill tube by laying the unit on it's side.

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