Just to let you know how lean the poulans are. I just got a poulan pro 220 from TX. It still had limiter caps on and was a 2001 year. The H was set at 1/2 turn out from needle seated postion and could only be turned to 3/4 max with caps on. I pulled the muffler and took out the baffle and screen and opened the back holes with the screwdriver too. It took just past 1 1/4 turns to get the 4 stroking sound you talk about. Just showing 1/2 turn from factory seems to lean. The rpm's it was doing put the fear of the lean condition in my mind too. Now I feel better about it being alittle richer.