The type of drive your starter uses depend on a fast start of armature rotation to get the drive to engage. It has an inertia type drive with a helix spline to move the drive into position in the ring gear. The armature has to start very quickly so the drive will slide down the helix and engage the ring gear before it starts to turn with the armature. If the armature starts too slowly or the helix is sticky the drive will start to spin before engaging the ring gear.Running at 12 volts actually makes this type of starter engage better. The down side of the more rapid rotation is that it puts more stress on the spring in the drive when it has to start to turn the engine. On the other hand the same drive is used on an M and many of them have been used for years with 12 volts and have not and broken springs. It is highly unlikely you will ever see it happen on a 100.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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