Its pos. ground, 6-v --AND whatever you do,-- do NOT put 8-v in it, you will fry everything in the electrical system!!!----check gen output, then cutout/voltage regulator for proper action, then make sure the ammeter is wired properly! (if ground was reversed, you have dead regulator and will need to get new pos. ground 6-v unit and start over!)
8-v batterys have killed everything they have been installed in and should be banned from manufacture! thanks; sonny580