I am doing this tomorrow. It can freeze anyday now. I think last year it was snowing already.
You have an I/O or Outboard? You can chop the OB out of the ice and then winterize it. The I/O needs to be winterized before the ice gets thicker than 1/8"
How easy can the outdrive freeze? Or the leg on an outboard? I have been thinking of taping the prop exhaust shut so water or snow does not get in there.