Reply To: Weak spark on 1973 20 Hp Johnson

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July 31, 2020 at 7:59 am #210448
Don
Participant

    US Member
    Evinrude 25 wrote:

    Hello,
    Rusted or poor terminal connection rules out in this case since the spare plug cable comes together with the coil as you could see in the picture. It is Mallory Marine Ignition Coil 9-23106. I have checked the new coil resistance vs the old coil. I don’t see the different. I suspect the old coil is still good. I am going to put the old coil back to see if I could get the spark!!! It is just an experiment.

    I don’t think you have an ignition problem, the engine sparks well while cranking, correct? Have you checked the choke linkage?