Reply To: 1955 25hp Johnson RDE-17 spark plugs

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April 30, 2021 at 8:26 am #237432
Casey Parr
Participant

    Thanks! I was wondering about xd100! Do you still mix it 24:1? I read someone posted xd100 was harmful to carb engines, but I didn’t think he was right on that one lol. Seems to me full synthetic would be beneficial! Still wondering about the JC8 plugs tho. Don’t want to burn up a piston or run it to hot.