Not being there and not knowing the farmer Billy Bob jury rig "fix" one can only "guess" but here goes no warranty.
I suspect if its a 6 to 12 volt conversion the original 6 volt coil was retained and an external series voltage dropping (12 to 6) Ballast Resistor was added. Then he may have added a momentary push to close switch that by passed the ballast resistor as long as the button was depressed. That would result in more coil current and what he calls a "hotter spark"
Many tractor companies used such a similar arrangement, HOWEVER it was done automatically without having to push any manual switch by use of a solenoid or a mechanical switch section on a starter switch.
When he said "power drops down to about 4 amps while starting" he may have meant with the 6 volt system the voltage dropped down to 4 volts?????
Thats my best guess not being there and it may be right or it may be wrong. I may think of others but that's enough for now.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that�s wha
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