Ruff Idle problem

[Fred K-OR]

Have a problem with my 29 huckster with a ruff idle. It sounds like when a person has the GAV screwed out to far. Like it is getting to much gas. Also when I screw the GAV all the way in it still has the same problem. Spark plugs are black and when first starting, it leaves black stuff on the floor out of the exhaust.


I replaced the carb with another carb I had that was a good carb. Still the same problem.

Have not done anything to the distributor yet.

Any ideas would be appreciated.