I was up to check on the boat this morning (on the hard) and found the bilge filled with about 6 inches of liquid and frozen. I think I'm OK for now, as only the top inch or so was frozen and I was able to break it up and manually pump it out, and then I poured in a gallon of anti-freeze and pumped some of that through the system. In October I had done the same, and I think that's what kept the bilge from freezing solid as a rock. Obviously, water is getting in somewhere, but that's not something I can investigate and fix now.
My question is, if the bilge freezes through solid, what do you do, and how much of a problem is that? Is the expansion of the ice going to cause issues? The only thing in the bilge is the hose from the manual bilge pump, otherwise it's just an empty fiberglass hole.