In Vermont and found that my 4000 has a loose intake manifold. Removed the cylinder hex bolts but found that the right rear one is rounded off. Guess it was like that when I picked it up. Any ideas? Wonder if I can force a metric 5 mm T handle Allen wrench on it to get it loose. Someone suggested putting JB weld onto the 3/16 t handle let it harden and remove it. I have my doubts it would hold. It's in such a tight spot that options are limited.
For the amount of work it takes, I would remove the cylinder. The factory thread locker that Poulan used on the carb adapters holds quite tight so you may just further damage the fastener head. If you damage the head of the screw further you will end up pulling the cylinder anyway. I don't suppose you brought your ring compressor with you?