See post #3I know I'm a little late, as I just read you post/question.
Unplug the fuel line after the filter, and use a remote fuel tank.
6 gallon fuel tank
2- 1/2 gallons of 89 octane or better fuel.
1 quarts of premium plus 2-cycle TC-W3 outboard oil.
2-1/2 ounces of Fuel treatment/stabilizer.
This gives me enough to both my engines, plus my generator for 2 years.
But, yeah, I'd say you're A LOT late - I'm sure he has winterized it by now!