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    maccus45's Avatar
    maccus45 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 7, 2009, 02:15 PM
    Lawn mower backfires and will not run full speed.
    I replaced the gear ring that is under my flywheel and the gear on my starter. After I was done replacing both of them my lawn mower started right up, but it would not go to full speed. I thought maybe the carb. Needed some adjusting so I started to adjust it. Now it backfires, will not run fast like it use too. The engine is a Briggs and Stratton 14.5. If you can help me I would really appreciate it.
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #2

    Aug 7, 2009, 02:28 PM

    Hi,
    I would say that in reinstalling the flywheel, sufficient torque was not applied and the key is partially sheared. They will often run, just badly; the newer, the more likely.
    Peace,
    Clarke
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