The reason the resistor gets hot is as stated below (it needs to get hot to work) the reason the ignition should not be turned on while not running is that almost all engines stop with the points closed. Thus when turned on and not running, the full draw of the coil and resistor is placed on the system continuously. When running, the point closed time is about 50% on 50% off (Dwell). This results in the coil and resistor and points only having current flowing one half the time. This allows the devices in that circuit to cool half the time. Jim
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Today's Featured Article - The Fordson F Ignition System - by Anthony West. A fellow restorer contacted me earlier this year asking for some help and advice on a model F that he was restoring. He had over a period of months spent a fair amount of his hard earned cash on replacement parts for the old "trembler" ignition. Sadly though all his efforts seemed to be a waste of time and money as he still couldn''t get the temperamental old thing to run correctly!! If i said that this was a little frustrating for him that would be "conservative" in fact the problem had reduce
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