Re: Spark Plug Recommendation

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March 30, 2018 at 5:16 pm #73252
chris-p
Participant

    For the 50s OMCs, almost always start with a J6C (J6J replacement)

    The J8C is much too hot a plug for what you need.

    It is possible you may want to step down to a J4C, if the J6C is running too hot or you do a lot of wide open throttle running. After a few outings, check it. Should be a light brown colour.