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Good Morning JE, yes, you heard right, ALL 2 cylinder JD's came from the factory wired as Positive Ground, and yours came as 12 volts. It was most likely converted to negative ground when it was converted to an alternator, as most all them require negative ground systems. To convert it back as original, since it came positive ground you can sure go back that way, although a generator could work either way. You will need a 12 volt Generator and a 3 or 4 wire Voltage Regulator (either will work, they are usually mounted right to the generator). Three wire VR's have 3 terminals labeled ARM (or GEN) BAT and FLD, while 4 wire VR's have 4 terminals labeled BAT and FLD amd LOAD plus ARM which is often on the opposite side or out the bottom. 3 WIRE VR WIRING ARM (or GEN) on the VR is wired to the Armature (larger of 2) post on the generator. BAT is wired to the load (non battery) side of the ammeter. FLD is wired to the Field (smaller of 2) posts on the generator. On 3 wire VR systems, all loads like lights and ignition are fed off the load (non batetry) side of the ammeter. 4 WIRE VR WIRING BAT is wired to the load (non battery) side of the ammeter. FLD is wired to the Field (smaller of 2) posts on the generator. ARM (one maybe on opposite side or out bottom) is wired to the armature post on the generator. LOAD is wired up to the light and ignitiion switch. On 4 wire VR systems, loads like lights and ignition are fed from the LOAD terminal on the VR, NOT the ammeters load side like on 3 wire systems. If re wiring, be sure that BOTH the generator and VR have good grounds, the VR usually right to the generators frame. The battery can be connected as positive to ground, and once shes all wired up, polarize it by momentarily jumping a wire from the VR's BAT terminal over to its ARM terminal and you should get a small spark. If the ammeter reads backwards (I dont know if it was swapped before) you may have to reverse its leads. If it has a 12 volt internally ballasted coil (NO external ceramic ignition ballast resistor), let me know and I probalby would not mess with its wiring. If it has a 6 volt coil and an external ceramic ballast resistor and you go with negative ground, wire the coils lil + terminal to the distributor and its lil - terminal gets power from the ballast. Since its impossible to say how shes been changed or wired over the years, I tried to cover most situations and so a 3 or 4 wire VR will work depending on what you're able to purchase. Post back if you need more help or a wiring diagram (or try>Link Best Wishes John T Nordhoff in Indiana
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