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    buck82's Avatar
    buck82 Posts: 1, Reputation: 1
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    #1

    Jul 27, 2010, 08:43 AM
    Briggs&stratton 20 hp motor will turn but will not start
    20.5 briggs&stratton elect start,motor will turn fine but no spark, even checked to see if it had spark with plug, no fire
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jul 27, 2010, 09:26 AM

    . Clean any rust from the magnet on the side of the flywheel.

    . Review the wiring and connectors, looking for anything that appears suspicious.

    . Remove the flywheel and check the points and condenser, if your engine is old and has these.

    Some of the shut-off cables stretch, preventing the switch on the engine from disengaging. The engine shut-off switch, controlled by the engine shut-off cable, grounds the coil to stop the engine. I rarely find bad coils. The problem almost always involves the cable or the shut-off switch assembly. Follow the cable from the handle to the engine--you will find the shut-off assembly. Make sure the switch mechanism is fully pulling the switch to the "open" position.

    Make sure the safety switch (or kill switch) is working properly. This is the lever you pull back before starting the mower. Verify that the cable is engaging the switch and verify that the mount (or bracket) that stabilizes the cable to the lawn mower handle is attached properly. A broken bracket will cause malfunction.

    This link may help:

    https://www.askmehelpdesk.com/cars-t...ml#post2296036
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