This ethanol crap is bad news for any motor that sits!!! Be it second or antique car, motorcycle, atv PWC string trimmer lawn mower ETC. I have been using a product called SEA-FOAM for many years with excellent results. It's Far and away better than Stabil.
Something else I only recently found was a Lucas oil product Ethanol safety. It specfically designed for E10,E15 and E85 fuels.
Google them and decide for yourselves. I use it I like it and I have had zero problems ever since.
CW