Hey Sagebush (and all posters), my dad and I are following your posts. We're having the same problem that you describe.
Funny thing, this is the second time we've had the problem. The first time there was blockage in the fuel line - he blew it out with compressed air and we lost the piece before we could identify it.
Now the problem isn't so easy to fix. We haven't pulled the carb off yet, but that's probably the next step.
Thanks for posting, just wanted to let you know that there are interested readers.