is it 2 stroke or 4 stroke?
if its 2 stroke, you need to drain all water out of the block (use a compressor and blow air through to get all out, then fill up with plumbing anti freeze, also a little plumbing anti freeze in the muffler and hull so any excess water in those areas does not freeze.
to fog all you do is run the engine and spray the fog into the carbs, when the machine starts smoking you have coverage, also take plugs out and spray extra fog into the cylinders
I know nothing about the 4 strokes....not sure if they are liquid cooled or not
hope this helps