I bought some Sea Foam on Thursday from an Autozone, they also had Stabil and marine Stabil on the shelf, plus some Lucas stuff and one other brand of gasoline cleaner stabilizer.
Seafoam says 1 ounce per gallon of fuel, it will run a littlle lean for that first tank unless you drain it out and fill with fresh gas.
I wonder if 1/2 ounce per gallon would work, sure would make it run better in the spring. Make sure you run the engine long enough for the stabilized fuel to get into the carb, then you can drain the bowls or not. Draining is the safest way.
If you are really concerned, you should pull the plugs and fog the cylinders then put the plugs back is to keep stuff out. Also plug the exhaust and the air cleaner. And if you are really into it, get some boat shrink wrap film and shrink the entire machine in a blue plastic cocoon.
Don't forget to put the front and back end up on stands to keep the tires from getting flat spots too.
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