Posted by Steve@Advance on November 25, 2018 at 18:13:12 from (66.169.147.211):
In Reply to: Oliver 77 posted by Grandpa love on November 25, 2018 at 16:27:03:
Nice! Is that original paint?
As for the electrical system, it was probably 6v positive ground. Just about all the gas tractors that era were. Do some investigative work, look at the electrical components, like the generator, regulator, coil (and resistor if equipped), light bulbs, anything that might have a voltage or part number on it. Google the part number, see what the voltage is.
If it has a resistor ahead of a 6v coil, good bet it has been converted to 12v.
To check the charging system you'll need to get it running first. You can start it up on 12v if that's the battery you have available. I would connect it positive ground. Then before starting it, polarize the generator. Easy, just run a jumper wire from the negative battery post and spark it to the A terminal of the generator. Just spark it, don't leave it connected.
Have your volt meter ready, connected across the battery. Get it started and revved up to charging range, see what the voltage reads. If it reads around 13-14v, it is charging and has been converted to 12v.
If the reading is low, around 12v, it is not charging. Try removing one battery cable (safe to do with a generator only), keeping the volt meter connected to the cable. If it keeps running, and the voltage drops to around 7-8v, it is set up for 6 volt.
If the voltage immediately drops to zero as soon as the battery is disconnected, something is wrong with the charging system and it will need further diagnosis. If you are trying to keep it original, try to save all the original components. They are much higher quality than new aftermarket. If there is a good starter/generator shop near by, they can be a valuable asset.
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