JD A backfires

[Dave Bascom]

I just bought a JD "A". The tractor is a little hard to start, and when you do get it started, it backfires a lot. Someone told me to adjust the points. Anyone know what the point gap should be set at? Any other ideas what may be wrong?
Thnx, Dave

 

[Anonymous-0]

Have you checked the timing marks? What about the carb? Does it backfire under load or idle? Both?
What year? Battery or just mag? LEN

 

[Anonymous-0]

Set you point gap at 0.021. While you are at it you might clean or replace your plugs.