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    rmj1258's Avatar
    rmj1258 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 6, 2012, 04:55 PM
    Why do the coils keep burning up on my 18.5 hp Briggs & Stratton lawnmower motor
    The coils keep burning up on my lawn mower, which has a 18.5 briggs & stratton motor. How can I keep this from happening and what is causing it?
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #2

    Oct 13, 2012, 06:27 PM
    Hi,
    You have not specified a brand, but battery voltage being applied to the ground terminal of the armature is by far the most common cause. Briggs even has a service bulletin on this dating back to 1982 and the most common culprit is the ignition(key) switch.
    Peace,
    Clarke
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