I bought this last week on that auction site. Don't have it yet.
Guy advertised it as a Poulan 2150 and said it was 2.1 cubic inch. Makes sense with a model number of 2150. 2.15 cubic inches. 35cc

Someone who was looking at the auction must have sent him an email, because he posted some comments to the auction that indicated it might be a 42cc, but he wasn't sure. That would be a 2.6 cubic inch.

Anyway to identify it by the pic?

I don't care either way. I was gonna buy it if it was 35cc anyway. If it's 42cc, then thats just a bonus. Of course, after it gets here, I'll measure the bore and stroke to calculate it for sure. But, curiosity is killing me and I'm bettin' on of you guys knows what it is, with the Poulan engines being so popular and all.

Thanks