I live in MI and have just done the following:
1. add fuel stabil to the gas, run it for a while to allow it the treated gas get into the carbs
2. while its running add RV anti freeze to where you would flush out the machine you may need an adapter to connect and pour a half gallon in until it flushs out pink
3. Spray fogging oil into carbs while running gas it a few times and spray until the engine dies from the oil overload
4. pull spark plugs and spray fogging oil directly into the cylinder- cover spark plug holes with a towel and hit the start button a few times to allow pistons to go up and down. use alot of fogging oil in this process you dont want corrosion in there.
5. saturate interior with WD40 to prevent corrosion on the motor itself,grease all fittings
6. pull battery
I think that is it. most important part is anti freeze if you are in a cold state there is always residual water in the machine
