Home › Forum › Ask A Member › Spark Plug Recommendation › Re: Spark Plug Recommendation
March 30, 2018 at 5:16 pm
#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.