I am running a big Stihl for falling and a small Husky for limbing. While I have never had an issue with the Stihl, the Husky was good all day and would not start one week later. Problem was a crack at the fuel pickup in the tank. Replacing all the tubing solved the problem. When removing the fuel lines, all of them were disintegrating. Why the lines in the Stihl are ok is unknown (same age) but will be replaced before using again.
Got to love ethanol.
