Reply To: Johnson FD-12 Won’t Run

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March 28, 2023 at 5:44 am #274476
billw
Participant

    US Member

    To me, if I looked at those two plugs, I would be thinking I had poor spark on the one that is NOT fouled, as it doesn’t even look like it fired much at all. If you don’t have true, open-air spark testers, you can just rip the ground electrodes off regular plugs, creating a bigger gap. A good OMC ignition will jump that gap in open air.

    Long live American manufacturing!