Ditto the carb clogged with gunk from the stale fuel. I'm religious about keeping my Stihl empty when it's not in use. Had a used snowblower that had had stale fuel sit in it. Wouldn't run well at all and I had to rebuild the carb - the float in particular was so gummed up, it wouldn't clean up properly, never mind the pins! If it is only a bit gummed up, you might be able to run it clean, if it's really bad though it'll need to be opened and cleaned up, IMO. Good luck!

__________________
Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon