Re: 2-stroke vs 4-stroke spark plugs;am I dreaming

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July 8, 2015 at 7:39 pm #19677
frankr
Participant

    You aren’t dreaming or senile. Everything you said is true. The J6J is a two-stroke, and the J4C is a four-stroke. The J or C tells the tale. They do not make the J-suffix two stroke plugs any more.