I have decided to go with the 100 octane low lead Aviation gas for my chainsaw and other yard equipment (trimmer, hedge trimmer, mower, etc). All of the gasoline available around here is required to have 10 percent ethanol in it and I do not want to use it anymore due to the poor shelf life and possible damage it can do to my equipment. The local airport has the 100LL gas and its easy to get and does not cost that much more than regular gasoline. My question is.... do I need to re-tune the carburetors on all of my stuff in order to run this fuel? I just filled up the tank on my husky 455 and It seemed to be fine, possibly idles a little differently but I did not notice any performance changes right away. I do not really have any experience tuning carburetors and my husky dealer already had my saw setup before I took it home. With running this aviation fuel do I risk doing any damage to the saw without having it specifically tuned for it?