Reid..... .....that is what the "3rd brush" is all about, control the 9N genny volts output so you don't "overcharge" the 6 volt battery and boil out the acid and warp the plates. That is the ONLY voltage regulation your 9N has, manual adjust the 3rd brush so that you ampmeter shows about 3 amps charge when running about 1/2 throttle. Actually, some of the 3rd brush gennys can do about 17 volts without a load. Anysort of a load sucks the volts down, headlights, ignition, even charging a battery is a "load" to the genny. As I said, adjust 3rd brush for about 3 amp charge at 1/2 throttle. It can only output 11 amps MAX at 6 volts which is not very much, considering that the ignition sucks 3 amps and headlights 4 amps each. One of the big causes of 6 volt battery death, driving with headlights on. The 1-wire 3rd brush genny is "crude" but works .....IF..... the tractor driver is paying attention..... ....Dell Who reminds you of the 6 volt mantra: "keep'em clean, bright, and tight"
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