After paying a mechanic to try and repair my problem with my 272XP, and finding out he didn't actually fix anything, I took the muffler off to see if it was plugged. It was fine. As a last ditch effort, I removed the air filter to see how it would run without it. Well, It ran like a top. Funny thing was, it looked spotless. I called a Husky dealer to order a new filter and he said that there is something about how those nylon screens react with fuel over time and fuses the screen creating a plastic barrier that air cannot flow through. So I ordered the felt filter. Dolmar 7900 is on hold. The End