Yep. Screwed up a 4 stroke lawnmower with it. It seems to be ok if you use the device regularly, but trouble comes if it sits like over winter. In that case you need to drain the tank and carb before you store it. Stabil makes some stuff to treat ethanol fuel. Can't say if it works. I've gone to non-ethanol and add regular stabil anyway.
"Here fishy fishy."