The combination of old ethanol fuel and being stored someplace where the temperature can fluctuate wildly can ruin the fuel system on chainsaws more than any other tool because they are used less often by homeowners and the fuel gets older than it might on a string trimmer or blower. I get these all the time where they have been stored outside or in a hot shed.

Thanks for watching! If this helped, SUBSCRIBE! It's free and it helps us make more (and better) videos. I do my best to respond to all comments. Thanks