Some of the Walbro carbs will pass enough fuel to work with ethanol, others need to be modded for more fuel passage area. The other concern is finding a proper oil as oils typically used with Gasoline will not work. The oils used in Standard methanol based glow fuel will work as will some others. One popular brand is Klotz and they make a couple of different oils that are compatible. Some of the major glow fuel manufacturers also sell their proprietary oils seperately. As far as the engine itself, it will run just fine on ethanol with no mods needed.