"Stabil" is a good product, all might consider using over the winter whilst it sits in the paddock. Gas goes bad and as Scuba Girl has mentioned varnishes parts sitting in it. If I remember rightly and I could be short on memory it lasts normally 6 months but can be increased up to two years.
Even diesel oil looses it's cetane within about 3-6 months and requires a booster.
Also, the fuller the tank, the better as moisture condenses on the inside of the tank. Winter gas has at least 10% ehtanol in it and this will soak up most of the excess condensation.
"Engine fog" would be good, though, would require modification.
I've kept machines for up to 5 years this way and they start and run perfectly.
" **** the torpedoes,...Full speed ahead! "