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  1. #1

    Join Date
    Jul 2011
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    3
    Location
    Massachusetts
    Mower
    Craftsman

    Smoking Lawn Mower!

    So I bought a second-hand Craftsman 550 push mower (gas) last year in great condition. I've been using it all Spring after having stablized the gas over the winter. Today I checked the oil level and added more SAE 10W30, then mowed easily for about 45 minutes. All of a sudden, the engine started to race and blow huge billows of smoke from the round metal thing on the left of the engine. The engine wouldn't stop, even when I let go of the handlebar. It took about 2 minutes to shut off and stop smoking.

    Have I somehow ruined my mower? Can I fix it myself without having to pay someone $80 just to look at it? I'm pretty handy but am admittedly naive when it comes to dealing with mowers.

    Any help would be much appreciated!

    Thanks - Jennie

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  3. #2

    1,000 Post Club

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    May 2010
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    Illinois
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    kioti/rhino finish mower

    Re: Smoking Lawn Mower!

    what color was the smoke. black means too much gas. white means you are burning oil. could be caused by over fill of oil or from maybe mowing on an incline that caused oil to be draw into the breather, or a combination of the two. the failure to shut down may be due to a dieseling effect which means the fuel or oil being drawn in to a hot engine was self igniting.
    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
    Briana's Avatar
    Join Date
    Jul 2010
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    1,550
    Location
    California
    Mower
    Looking to Buy :)

    Re: Smoking Lawn Mower!

    Hey there - WELCOME to LMF!

    I moved your thread to the Small Engine & Mower Repair Forum.

  5. #4

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    reddragon's Avatar
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    southern oregon
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    little this...little that

    Re: Smoking Lawn Mower!

    thats just bizarre!!....color of smoke?..but the ignition staying on at the same time...weird!.....the round metal thing?.....can you take pictures?

  6. #5

    Join Date
    Jul 2011
    Posts
    3
    Location
    Massachusetts
    Mower
    Craftsman

    Red face Re: Smoking Lawn Mower!

    I borrowed a friend's husband and he figured it out! Wouldn't you know a MOUSE had built a nest inside the motor housing! TONS of what was probably a gardening glove was jammed up against the "round silver thing" which explains the smoke. It's all good now and I can officially mow my own lawn in pretty patterns or illogical lines - one benefit of being a divorcee!

    Thanks everyone for all the help!

  7. #6

    Join Date
    Aug 2011
    Posts
    225
    Location
    Alabama
    Mower
    Piston Powered

    Re: Smoking Lawn Mower!

    Quote Originally Posted by JBoo91 View Post
    I borrowed a friend's husband and he figured it out! Wouldn't you know a MOUSE had built a nest inside the motor housing! TONS of what was probably a gardening glove was jammed up against the "round silver thing" which explains the smoke. It's all good now and I can officially mow my own lawn in pretty patterns or illogical lines - one benefit of being a divorcee!

    Thanks everyone for all the help!
    Thanks for the update!
    I don't think anybody would have guessed that a mouse was the problem. Good thing it didn't catch fire or cause your garage or shed to burn down.

  8. #7

    1,000 Post Club
    reddragon's Avatar
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    little this...little that

    Re: Smoking Lawn Mower!

    does the engine shut off now?....
    '97 MURRAY 15.5hp TECUMSEH..42"...6SP............'04 TROY-BILT BRONCO....18.5 BRIGGS..42"...AUTO...CRUISE...
    '06 MTD YARD MACH...15.5 HP B&S...42"..6 SP ....'99 CRAFTSMAN...19.5 HP....42"...6SP
    '94 AYP KGRO...16HP B&S...42".....5SP ................'77 SEARS 18-6...18HP ONAN ...42"....6SP
    '98 CRAFTSMAN..17HP B&S ..42"...HYDRO............'93 MTD YARD MAN 18HP B&S ...42"....HYDRO
    '02 CRAFTSMAN LT1000.. 17HP B&S...42"..5SP.....'00 MTD 679..17.5 TECUMSEH...42"....7Sp

  9. #8

    Join Date
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    Massachusetts
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    Craftsman

    Re: Smoking Lawn Mower!

    Quote Originally Posted by reddragon View Post
    does the engine shut off now?....
    Yes, it does! Works perfectly after we pulled all the junk out and let the remaining smoke run out (about 2 minutes).

  10. #9

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    Re: Smoking Lawn Mower!

    good to hear......but if it was overheated...i would change your motor oil.......were there dead bbq mice?
    '97 MURRAY 15.5hp TECUMSEH..42"...6SP............'04 TROY-BILT BRONCO....18.5 BRIGGS..42"...AUTO...CRUISE...
    '06 MTD YARD MACH...15.5 HP B&S...42"..6 SP ....'99 CRAFTSMAN...19.5 HP....42"...6SP
    '94 AYP KGRO...16HP B&S...42".....5SP ................'77 SEARS 18-6...18HP ONAN ...42"....6SP
    '98 CRAFTSMAN..17HP B&S ..42"...HYDRO............'93 MTD YARD MAN 18HP B&S ...42"....HYDRO
    '02 CRAFTSMAN LT1000.. 17HP B&S...42"..5SP.....'00 MTD 679..17.5 TECUMSEH...42"....7Sp

  11. #10

    Join Date
    Mar 2011
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    879
    Location
    Washington
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    honda 1031, cub cadet 2164, jacobsen park 30, simplicity

    Wink Re: Smoking Lawn Mower!

    Quote Originally Posted by reddragon View Post
    good to hear......but if it was overheated...i would change your motor oil.......were there dead bbq mice?
    A little KC BBQ sauce, some Schmidt animal beer...

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