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  1. #1

    Join Date
    Feb 2012
    Posts
    1
    Location
    Louisiana
    Mower
    Cub Cadet

    Murray smoking and rattling. 12.5 hp Briggs OHV

    Neighbor lady has a Murray riding mower with a 12.5hp Briggs OHV. Starts instantly and seems to run OK but smokes like a b*%$ and is noisy (rattling).
    I think the motor is probably toast, what else will fit?
    I told her I'd swap the motor but really not interested in rebuilding it.

    Thanks!

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  3. #2

    Join Date
    May 2010
    Posts
    5,446
    Location
    Kansas, Butler county, Just east of DooDah
    Mower
    CTL

    Re: Murray smoking and rattling. 12.5 hp Briggs OHV

    Welcome to LMF...

    Check the oil level... likely has gasoline in it... causing it to be thin & overfull..
    This will cause both of your symptoms & will harm the engine if you run it like that...

    The typical cause is fuel flooding through the carb while the engine is off, it gets into the cylinder, goes past the rings and into the crankcase.. KennyV

  4. #3

    Join Date
    Mar 2011
    Posts
    880
    Location
    Washington
    Mower
    honda 1031, cub cadet 2164, jacobsen park 30, simplicity

    Re: Murray smoking and rattling. 12.5 hp Briggs OHV

    Quote Originally Posted by KennyV View Post
    Welcome to LMF...

    Check the oil level... likely has gasoline in it... causing it to be thin & overfull..
    This will cause both of your symptoms & will harm the engine if you run it like that...

    The typical cause is fuel flooding through the carb while the engine is off, it gets into the cylinder, goes past the rings and into the crankcase.. KennyV
    I'll bet Kenny is spot on..check it out.

  5. #4

    2,500 Post Club
    reynoldston's Avatar
    Join Date
    May 2011
    Posts
    3,677
    Location
    Marion,NY
    Mower
    Ferris, John Deere, Wheel Horse, Toro

    Re: Murray smoking and rattling. 12.5 hp Briggs OHV

    If you do decide to replace the engine and want the lease amount of work if it was me I would instill the same model engine I took out. This way also you would have a lot of exter parts if something was bad on the replacement engine and everthing would fit. If not I would say a rebuild would be easyer and less work.

  6. #5

    Join Date
    Aug 2011
    Posts
    330
    Location
    Maryland
    Mower
    Ford, John deere, Husqvarna, Snapper

    Re: Murray smoking and rattling. 12.5 hp Briggs OHV

    head gasket could be the cause as well, OHV are nitorious for this

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