Bowtie
Gearhead
This is Rooshooter's picture--a stock saw sold in the locality in which it was used and used in a normal fashion. I would hate to see your idea of a bad air filter or an "issue."
Geesh, I must be special because I use the crap out of my 361 and it has never looked like that. Somebody did something wrong, and it wasnt Stihl.