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Thread: well, the darn thing is out

  1. #1951
    Senior Member pelago's Avatar
    Join Date
    May 2016
    easter north carolina
    Just for the heck of it, i measured the ohmic value of the spark plugs, two bad ones had resistance but much less than the good ones? what is the correct value of the restive plugs used on these motors

    spark plugs.jpg
    Last edited by pelago; 10-21-2019 at 07:49 AM.

  2. #1952
    Senior Member bmorgil's Avatar
    Join Date
    Dec 2018
    Northwestern Ohio
    Maybe email the manufacturer for that info. I think anything more than 5000 ohms is too high for modern ignition systems. I am sure a points type standard (Not High Energy) ignition would need much less resistance. It is a voltage issue. The higher the secondary voltage the higher the resistance.

  3. #1953
    Super Moderator LarrBeard's Avatar
    Join Date
    Nov 2014
    Ft. Wayne, IN
    Check leakage resistance from center to shell. I'd suspect leakage or breakdown more than an open.

    (A multimeter may not read high enough to give a good answer and I don't know anyone who has a Megger any more ...)

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