Simply stopped

I think he meant that he took the starter to autozone and the replacement did not resolve the issue. Coincidentally this happened to us today on our 318 Scamp - started fine while trying to dial in the new carb and then no crank. Thanks for the suggestion on the ballast as that's one part we haven't replaced. I'll add my 2cents tomorrow after some troubleshooting.

And having spent hours searching this forum, some topics are easier to find than others.