Reply To: Johnson A-25, SN 46333 – Won’t turn over

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October 7, 2021 at 10:04 pm #247881
HARRY D. NICHOLSON
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    A carbon-fouled spark plug is the same as a grounded spark plug wire, it won’t hurt the coil, but no external spark is produced by it to fire the cylinder. Same as a carbon-tracked distributor cap. It won’t spark properly but the voltage is still going someplace.