I don't think I'd run my saw as rich. As you progress the air cleaner dirtying and it gets richer. For a days work I usually pop the cover and tap the filter and blow out what I can without removing the filter until the end of the day. I would want it to clear and not burble even in small cuts. Probably some of the reason a tank of fuel doesn't last. A 7 tooth .325 sprocket gets poor fuel economy on an 026 also. My favorite on an 026 is 16" 3/8 bar but if I didn't have a bigger saw a 20" would be on it mostly. With .325 pitch I prefer an 8 tooth sprocket. Maintaining the air filter is quick and easy enough that I'd rather do it and keep using an 026 as I find my back likes the handling better then most the others I use and used and I trust their reliability more to based on my experience.