machines left out in snow generally suffer less problems than those left out in rain

the biggest problem with freezing is water expansion in pipes and radiators. water just sitting in the hulls doesn't seem to cause any problems when it freezes

at least that's been our experience storing our boats over winter

i've even pulled up and restored a fiberglass dingy that spent 8 years at the bottom of a lake that froze over most winters. a few bubbles in the gelcoat that shouldn't be there but eveything else seems fine structually