The Stovebolt Site Forums The Shop Area Engine Shop 6v starter, wiring, and starter switch

Bob, now that you mention it, Model A's had that same insulator piece on either side of the bar that makes contact with the button on the starter itself, although I think the only way the bar could contact the housing would be if it was either assembled incorrectly or the contact bar had bent or broken. I'm remembering it from 50 years ago, though. A broken switch is a definite possibility. It would be easy enough to check by removing the switch.

The other thing would be a loose, high resistance connection at the cable stud. That could cause a lot of heat buildup.