We have non-ethanol gasoline available here in Texas. It costs 40 cents a gallon more, but we don't get all the ethanol problems in our carbs especially small engines like zero turns. Our chainsaws run on synthetic fuel. Have not had to touch a carb since we started doing this method.
FYI
Reno in Central Texas, 86 F250 XLT Lariat eclb 2wd 6.9, plus 2 Bricknoses, 1 Aeronose that's getting a Bullnose front clip, and parts trucks. Busy lads, father and sons wrenchers.