Hey guys, I need some input.....I am having a bit of problems with the idle on a 21-4BTT. It only has a gallon, maybe a bit less on it. The idle is rich and when I lean it out, it goes from rich to pinging. I can't get it just right. I have a 21-4C Team, and I can get it perfect.

I have replaced the glow plug and went that route....I don't think that is the issue.

Any ideas? Do i just need to run it rich and let it break in more maybe?