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    greenbrier's Avatar
    greenbrier Posts: 1, Reputation: 1
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    #1

    Mar 14, 2012, 06:38 PM
    Craftsman 917.273640 Won't start
    I have a 18.5 hp 917.273640 riding mower that won't start. It has fire to the plug, new gas, used fuel conditioner during the off months. If you crank and crank you get a real loud back fire. Ideas?
    DG's Avatar
    DG Posts: 1,375, Reputation: 109
    Ultra Member
    		  
    #2

    Mar 14, 2012, 08:15 PM
    Sounds like the flywheel key has sheared .
    But I would have my valve clearance checked .
    Luck
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