Zero Turn Mower. I'm stumped.

I wish I could buy non ethanol fuel in this area. No can do. and Ill be damned if Im gonna buy it $8/quart at a time as "tru fuel"
There are people on the www who insist you can remove alky by adding water, shaking it, let it sit, and then siphon off the "good stuff". And you can SEE it in the bottom of a clear container.