I don’t know if Stabil or any of the fuel stabilizers really work 2+ years. You could hookup a small plastic bottle as a make shift fuel tank and do a “flush” with a mixture of synthetic tranny and 0 weight oil and just purge on your return. I mention this since I had an IP sit for a few years and I gave up trying to free some stuck elements. The old German steel can sit forever without issues or develop a few shortly. If you have any dampness you’re inviting mold