I looked at the old spark plug I have laying up at the house from my Farmall 460 Gas and it is labeled C15. A quick check at the Champion spark plug website says C15 is no longer made and lists D21 as the replacement. That is what are in mine now. The only strange thing is the Champion website lists the plug as a 18mm thread. I can't imagine a 1959 farmall having a metric thread; Kind of odd.
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Today's Featured Article - Harvestin Corn in Southern Wisconsin: The Early Years - by Pat Browning. In this area of Wisconsin, most crops are raised to support livestock production or dairy herds in various forms. Corn products were harvested for grain, and for ensilage (we always just called it 'silage'). Silo Filling Time On dairy farms back in the 30's and into the first half of the 40's, making of corn silage was done with horses pulling a corn binder producing tied bundles of fresh, sweet-smelling corn plants, nice green leaves with ear; the
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