- . Don't empty the carb. That will do more damage due to oxidization than leaving gas in it and it may dry out the gaskets and such. I don't run Ellie after I shut off the fuel anymore simply because of that. Keep fuel in the circuit.
- . If you are concerned with moisture being picked up by the ethanol use Sea Foam in the gas or in a pinch use Stabil. (I prefer Sea Foam over Stabil. Used both, Sea Foam seems to perform better)
- . If you do a search on the history of fuels, you will notice that ethanol/alcohol was used as a fuel before gasoline. Gasoline became the standard due to Mr. Getty and a few others in the Oil business. Henry Ford's creations ran on alcohol or mixtures in the beginning. Also after the Great War in Europe, ethanol/alcohol/methanol were all used as fuels. Carburetors can handle them.
- . My big beef with ethanol is the fabrications used to market ethanol plus the removal of vast amounts of farm food production lands in favour of gas production. There are far better sources for ethanol/bio diesel etc. And I am not happy with them adding ethanol and still charging the same price per litre. Nah ... doesn't sit too well with me at all. Nothing I can do about it though.
- . Bottom line - and I never thought I would be saying this cause I didn't want to use ethanol, is that it will burn properly in a Cub without modifications. Also a Cub with a steel fuel line doesn't have the problem a lot of yard equipment has in the degradation of the rubber or plastic fuel lines. This is an issue that can be solved with using the newer fuel lines.
With that out of the way ... there is no good reason to fear ethanol.