Thanks! I'm planning on taking the carb apart again to clean it out and replace the needle valve again, bc this has been getting worse the last few months.
BTW, what don't you like about copper fuel line? Too soft? Maybe that's contributing to this somehow, too. My neighbor's 9N line is steel, and he's never had this problem.
He's left his tractor sit outside for months at a time, too, while this one's always been barn-kept.
Thanks again, Dave H.