Before electrical battery systems were standard on farm equipment, old tractors relied on self-contained magneto ignition systems. Magnetos generated high-voltage sparks directly from engine rotation, eliminating the need for an onboard electrical battery. This reliable ignition setup ensured the tractor would start and run in remote fields, even after sitting idle through harsh winte... https://www.aniarticles.com/79175-old-tractor-before-buying-best-deals-buying-guide