Mike, like the others said about the socket, 7/8 will do it. But, if the center electrode has square edges the old plugs are most likely fine to use. As long as the plugs aren"t wet from oil soaking or flooding they are ok to use in the tractor engines. Save the money. I have had my f-12 since 1999 and it has the same plugs in it when I bought it and they were old then, it runs like a champ! Spend the money on carb cleaner and a wire brush to clean the plugs. You will need the wire brush down the road, trust me!
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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