it has been about 27 at night here and i noticed water dripping from the drain hole last night which is wierd becasue its always tilted with it unplugged and covered. it scares me to think there was water in the bilge that could have froze. will this cause damage and at that temp will it even freeze in a fiberglass insulated bilge? i tilted it further and about 15g came out. should i be worried about it cracking something?