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

    Aug 1, 2012, 01:07 PM
    Non starting briggs engine.
    Hi Guys.
    Here is the problem. Ihave a 12.5 Briggs engine fitted to a ride on. The plug sparks, the plug is wet with fuel. Starter motor turns the engine over well but the engine does not fire. I have fitted a new regulator which has made no difference. Oil level is fine. Safety swithes on ride on are OK. Can any body help?
    jsfocke's Avatar
    jsfocke Posts: 310, Reputation: 37
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    #2

    Aug 2, 2012, 09:01 AM
    The most common problem that you might have is a sheared keyway between the flywheel and the crankshaft. If you pull the nut off the top of the crank you can see the groove in the crank and a groove in the flywheel. There is an aluminum keyway (square stock) that keeps those two items lined up. They must be perfectly in line. If they are even a little off it will fire at the wrong time and the engine will not run.
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