If your small engines are quite old they’ll run fine on naptha, otherwise known as white gas or Coleman fuel, but that’s pretty danged expensive to mow the grass with. One can also obtain ethanol-free gasoline at the local airport, again for a price premium.
My twin engine fishing boat gets about 2 miles to the gallon. A small increase in fuel cost really hurts on a normal 100 mile round trip day on the water.
Link for non-alcohol 2 stroke premix.http://www.trufuel50.com/ Klotz has alcohol free race gas for sale in 5 gallon pails. Yes I know it is expensive.