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I have a 92 Toro riding mower with ignition problems. It recently stopped running while in use. Replacing the ignition switch did not solve the problem. I removed the spark plug, plugged the ignition wire back on it, and grounded it while cranking the engine. Very little to no spark was produced. I'm thinking that the Magnetic Coil is defective but it costs $140+ to replace. Is there another area that I should look at? Thanks, Bill

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  • Bill White
    Bill White Mar 06, 2009

    Thanks for getting back to me.


    The Model# is 32-12OE02, and the serial# is 1020311.
    Another observation I had when it would still run, was that when starting, I noticed some stray sparking on the right side of the engine under the hood. The only thing I can think of is the cable going to the starter. Never saw this happen before of since.


        Bill

  • Bill White
    Bill White Mar 09, 2009

    Mine has the Briggs & Stratton Engine, and yes, has a sponge filter.


       Bill

  • Bill White
    Bill White Mar 10, 2009

    Not sure if this is the right fix. The 'Coil' is a magnetic pickup from the flywheel and the magnetism is strong. Your part# 398811 @ $41.55 is different than the one I found on the Toro Web Site.


    My Engine/Motor Model# is: E125V-N/10964B. The coil part# listed by them is: NN10730 @ $144.10.


    However, I will try doing as you suggested. The wiring for the coil is thru a harness and has quick disconnects/shoe type.


    Thanks

  • Bill White
    Bill White Mar 12, 2009

    My apologies. I took a long and hard look and realized that mine is the Toro Power Plus, which is the 12.5 HP model. You got me going on that one and you're right, the 398811 is a briggs number. I remember seeing the Briggs name somewhere around the engine but when I looked again I could not find it. It is a Magneto powered plug.
    So I guess my question now is, how can I determine if the Magneto/Coil is bad?


    Thanks for hanging in there with me.


       Bill

  • Bill White
    Bill White Mar 19, 2009

    Hi again:


    The oil is fine. Don't know about the pressure switch.
    Anyway, I'm a bit lost when attempting to measure the resistance.
    I checked the clearance on the coil-module and adjusted it to .002.
    Your spec was .02, I am guessing that you meant .002.


    However, I did find that when grounding the plug to the top of the starter housing I was getting a constant spark. This tells me that the coil is doing its job in generating the spark. But it does not tell me why it won't  fire when the plug is installed.   Any thoughts?


    Thanks, Bill

  • Bill White
    Bill White Mar 23, 2009

    One final thing I tried was to disconnect the 3 clip-ons from the harness to the terminal next to the Magneto-Coil and crank it over with the plug installed. Nothing, so I tried different combinations and still nothing. At this point I think there is an internal problem with the harness or something. My only alternative now is to take it into a dealer and let them fight it.


    Thanks again for your help,


        Bill

  • dr1plain May 11, 2010

    They made that one with a Briggs and an Onan 1991 wich one do you have ? the briggs used a spong air filter .

  • dr1plain May 11, 2010

    I'm a toro dealer I need the model # so I can see what you got.

    most of the time you ether have spark your you don't no such thing as week spark on the bigger engines .

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  • 24 Answers

Unplug all wires to the coil if no spark it is a bad coil . the wire is used to ground out and kill eng.
coil part # 398811 $41.55
No voltage goes to coil .and it will kill if it does .
good luck

Posted on Mar 10, 2009

  • dr1plain Mar 11, 2009

    nn10730 is a onan part number, you told me you have a Briggs they use both on that model .

    The onan is a 12hp the Briggs was a 9hp 398811 is a briggs number .

  • dr1plain Mar 12, 2009

    Toro Power Plus 12.5/14hp Single Cylinder
    212-Series LT, 244-Series YT, 612-Z
    1. Disconnect the IP connector at the module.
    2. Disconnect the spark plug lead from the spark plug.
    3. Measure the primary coil resistance across the IP connector and the coil core. Primary resistance should be 1.0 Ohm.
    4. Measure the secondary resistance across the spark plug cable and the coil core secondary resistance should be 9.5K Ohm.
    5. If primary and secondary measurements are not as specified, replace the ignition module.
    NOTE: IGNITION MODULE TO FLYWHEEL MAGNET CLEARANCE. Measure the clearance between the ignition coil core and the flywheel magnet. If the measurement is not .020, loosen the module mounting screws and move the module to obtain .020 clearance.





    You have an oil presures switch on this unit some were wired to kill spark if oil is low . I will try and check if this one works that way.

    s

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