That 12v conversion willl have meant some cobblin' on the wires, but nothing major. From stock magneto wiring, it would require only a two-pole switch on the hot to the coil to replace the single-pole grounding switch used to kill the mag. That and a bulb or diode inline between the switch and the alternator to keep the alternator from draining the battery. BobM has had a very helpful set of wiring diagrams posted for some time, showing each layout -- link is below. Follow the link, and compare diagrams 4 and 5. (5 is for an H/M, but the concept is the same - bulb or diode inline in the #1 wire from the alternator.)
I restored the '47 BN my grandfather and his dad bought together when new. Along time int he works, and a lbor of love, but the old girl started up on the third pull of the crank.
Nothin' quite like gettin' an old family tractor runnin' again. Have fun with it!
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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