just got around to looking at this thread. Always ran good before it quit. Did you have to do anything else as far as repairs? I was thinking the fuel line was bad IIRC.
The only thing repair wise was the carb fuel inlet. The little elbow was missing so I stole one from a spare carb I had and it was good to go!
Got my hands on a pretty nice 4000 the other day! It’s next up on the bench! Of course I’ll get some pictures….