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Franklin Spark Plug Gap


pcolleary

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Do you have an Instruction Book? If not, the Franklin club probably has re-prints. I believe the gap should be .020, but I the book is out in the barn, and I will check tomorrow. I do know that the gap is very critical for decent running. We have two series 10s, and Champion W-18 plugs seem to run best.

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I have a 1921 9B.

I'll second the recommendation for Champion W18s.

My car is runs well with a gap of .030.

You are correct. The book calls for a gap of .031. Franklin has to make things complicated and add the extra one thousandth to good luck :)

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