That's the 50cc model 20" correct?
I have the 42cc model 18". I cut 6 cords per year for the last 6 years with it. Never had the spark plug out. Never fails to start or run. A little weak on 18" wood, but fine on 14-16" wood. The only problem I've had with it is the fuel line turned to mush and I had to replace that. I blame the 10% ethenol gas. (can't prove it, but fun to blame something! :laughing: ).
I think Poulan undersizes their motors for the bars they put on them. Put an 18" bar on that thing and it will be a terror. If my 18" ever dies, I'm buying the 20" like yours and putting my 18" gear on it. For the money, they are a very good deal. :thumbsup: