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    floyd5974's Avatar
    floyd5974 Posts: 8, Reputation: 1
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    #1

    Jul 13, 2010, 09:57 PM
    Tiller not firing
    I have a john deere tiller with a tecumseh h60-75389j. Replaced points,cond. and coil. Connected in line tester (glow tester) between coil wire and installed spark plug and no spark. Disconnected tester from plug and grounded to engine and I have great spark. Magnets on flywheel are strong and I completely removed kill switch wire to eliminate that. Please help. Thanks, Kevin
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Jul 13, 2010, 10:54 PM

    Bad plug.

    You can do it the hard way. Remove plug. Connect spark plug wire. Hold base of plug against bare metal of engine with a wooden block. Check for fire.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #3

    Jul 14, 2010, 09:17 PM

    Take out the glow tester and just look for spark the hard way.

    I once tried on of those E3 plugs and no spark. They have a gap internal to the plug. The spark tester may have the same.

    Eliminate the spark tester.

    Remember that firing in air will be weaker than in the engine.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #4

    Jul 14, 2010, 09:57 PM
    via PM


    Quote Originally Posted by via PM
    iller not firing
    Site would not let me reply again for some reason, so I hope you get this message. Tried it without the tester already, even held it with my bare hand to the metal and still nothing. picked up two new plugs today and tried them just for the heck of it and still nothing. 100% sure no fire is going through the plug. Any other help is appreciated, my brain is really hurting!!! Thanks, Kevin
    Your probably replying in the wrong box. Use "Answer this question" or whatever it is on the new skin. Apparently it's not the reply button.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #5

    Jul 14, 2010, 10:21 PM

    OK, I lost what I typed when AMHD hiccuped.

    Check the spark plug wire at the boot.

    Make sure the coil isn't installed upside down.

    Check resistances of the secondary while flexing the HV wire.

    Make sure the coil connections have a good ground.

    Lightly sand the magnets.

    Set the magneto gap with an index card.
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #6

    Jul 15, 2010, 05:12 AM

    Hi,
    Your original question as stated says that there is a problem with the plug or its ground. That is the logical extension of the facts. Those E3 plugs will not work in OPE. I have given brand new ones back to customers with running machines that had nothing but it replaced.
    Peace,
    Clarke
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