Run a jumper wire from the battery to the coil and see what happens. Something tells me the coil is getting its juice through the resistor while you are cranking it over. It will still have spark but not enough to start it in this cold weather if the coil is getting power only through the resistor. The resistor gives the coil 6 or 7 volts and that is all it needs to run but to start the engine the coil needs the extra oomph from 12 volts to overcome the voltage lost from the starter draw. It should be shunting 12 volts to the coil automatically when you hit the starter but a wire or switch might be bad and the shunting isn't happening. Give it a try. This still might not be the problem but the jumper wire is worth a try.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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