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 - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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