The SA I recently acquired has a 6 volt system, but a tiny battery cable to the starter. I got a new heavier cable today. When I removed the old one, to my surprise I noticed that the tractor was negative ground instead of positive ground. The tractor has been starting fine, and the ampmeter indicates good charging. Is there any reason to change it back to positive ground? :?: :?: :shock: My guess is that this was done when working to get it running before the sale after sitting so long. It has a new battery in it, and the tiny 12v cable was new too.