Re: Spark Plug Recommendation

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chris-p


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#73252

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.