Re: 1974 Johnson 15 hp runs on 1 cyl at low speed

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October 6, 2016 at 6:21 pm #45317
PugetSoundBoater
Participant

    The correct champion plugs shown for your model 15R74S are L82C or the hotter L86C

    "Some people want to know how a watch works, others just want to know what time it is"
    Robbie Robertson