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    strickler-don's Avatar
    strickler-don Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Apr 13, 2013, 02:08 PM
    Briggs and stratton 18.5 hp engine diagram
    Lawnmower was running fine, stopped in front yard to go in and eat, and when I came back to start it it cranked over 3 times and stopped. Done the same thing twice more then it back fired smoke came through the carborator. Does anyone no what's wrong and what I need to do. Its an 18 1/2 HP
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #2

    Apr 13, 2013, 08:56 PM
    Hi,
    First guess is that you shut it down with the engine revved up and you sheared a flywheel key.
    Peace,
    Clarke
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