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February 21, 2019 at 2:14 pm
#167804
It is probably a tapered thread spark plug. If and when you can determine which one it is, you can contact me directly and maybe I can provide it to you. I have a collection of very old plugs in a container in my shop. lautharr@sbcglobal.net or 231-929-7479
Good luck Lloyd Lautner