My local
Cub Cadet dealer suggested this. There is a product put out by Stihl (chain saws) that is purportedly REAL Gasoline..without the ETHANOL. Comes in quart cans....Not Cheap. He suggests..when you winterize/summerize..you run the engine for awile on this stuff ..to Displace the old Ethanol gas in the system. Then drain the carb as best you can.
NB