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 9N Lives Again - by Tyler Neff. I often reminisce about the good old days of my youth when I visited my grandparents on their farm in Moorefield, West Virginia. I lived in Middletown, Maryland, which was about two and a half hrs away from the farm. During my summer vacations I would spend two weeks helping granddad Wilmer with his farming duties. Wilmer and his brother Weldon owned the �Neff� farm. Th
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