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    bodeystafa's Avatar
    bodeystafa Posts: 8, Reputation: 1
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    #1

    Aug 22, 2009, 11:16 AM
    5HP Briggs Engine Shears Flywheel Keys. Why?
    I have a 5 HP Briggs on my go kart. It has sheared 3 keys already, and I am getting tired of replacing them. The keys are aluminum, and I was wondering if it would hurt to place a steel one in there. Would it do more damage than good?
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #2

    Aug 22, 2009, 12:42 PM

    Hi,
    Could ruin crank. If you are having problems with the aluminum, just think of what you would have thought of the old zinc!
    Two things cause shearing other than obvious over-loading; incorrect torque tightening flywheel nut/clutch and inner taper of flywheel damaged.
    Peace,
    Clarke
    bodeystafa's Avatar
    bodeystafa Posts: 8, Reputation: 1
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    #3

    Aug 23, 2009, 11:28 PM

    What is the recommended torque for the flywheel nut?
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #4

    Aug 24, 2009, 05:40 AM

    Hi,
    With a few exceptions the recommended torque is between 55 and 65 ft-lb. The higher number will not harm any of the engines.
    Peace,
    Clarke
    davenyk66's Avatar
    davenyk66 Posts: 1, Reputation: 1
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    #5

    Jun 13, 2013, 11:09 PM
    Quote Originally Posted by crigby View Post
    Hi,
    With a few exceptions the recommended torque is between 55 and 65 ft-lb. The higher number will not harm any of the engines.
    Peace,
    Clarke
    This helped me fix my rototiller, same engine, THANKS!
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