Reply To: Weak spark on 1973 20 Hp Johnson

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July 19, 2020 at 3:50 pm #209167
Don
Participant

    US Member

    Yes, I remember you posting about the new coils. But, Mumbles post is a good reminder for the rest of us when checking coil secondary resistance. Those poor/rusted connections often show up as an infinite resistance reading on the high ohms scale…A good coil could be discarded only because of a poor/rusted plug boot/terminal…