I don't doubt it, and I did the same with my motorcycle but never went more than 5 or 6 months on the gas. Also kept it in a heated shop with a full tank w/Sta-bil over the winter.
None of my lawn equipment has ever seen ethanol or climate controlled storage (at least while I have owned them), and I've held real gas in the cans for 2 years with Sta-bil, and no ill effects or rough idling or hard starting.
Some years back I bought a Honda HR215 mower cheap from a guy because it was hard starting. I ordered a new carb from Plano Power Equipment and don't run ethanol in it, and it's been one-pull every since...