Yeah ethanol contamination will do that. I’d replace that part and possibly the fuel pump.
If you can get non eth gas, I run that exclusively. If it’s hard to find, I’d at least try to fill it with non-eth prior to storage. Having the tank full gives less surface for condensation, and less of the gas is exposed to air, which delays the gas from going bad.
If I’m not using a machine for an extended period, I’ll siphon the gas into a jug to use in a car and replace the gas in the machine at least annually.
Having clean oil is also a good idea for storage.
06 Rincon 680. Foreman headlight conversion, Guru bumper, Warn XT30, Maier guards, Bighorns
05 Foreman 500 FM, 2.5 Warn, Bighorns
Dually Ram and Patio Hauler 5th wheel