[Pearls Before Swine]

They are coming for your small engines (boats, chainsaws, lawnmowers)! And while they’re at it, they don’t care if they screw up your auto/truck engine, either.

It for Muvver ErF!

[Governor Dinwiddie]

Small engines—chain saws, lawn mowers, weed whackers, generators—do NOT like ethanol gas. Most owner's manuals warn against it, and anything more than 10% will probably void your warranty.
 

[D Rider]

"...as science shows burning ethanol in warmer temperature leads to heightened ground-level ozone pollution and smog"

We have been saying that here for well over a decade. Ethanol is dirty compared to gasoline.

[trebb]

Not a fan of ethanol in gas but a lot of cars are designed to be able to run on high-ethanol mixtures and modern cars are designed to not be harmed by higher mixtures. Seems like small engine manufacturers should be able to make their stuff more durable under the realities of the day...but perhaps they like having their products be more “disposable” to increase sales.
One shouldn’t make swim suits out of material that dissolves in water or make engines that get ruined because there’s ethanol in the gas.
I’ve run ethanol-free gas from time to time, in several different vehicles, and noticed no difference in performance or mileage.