My boat is a 1984 MacGregor 25. I was motoring yesterday with the swing keel in the locked down position. While in the middle of what was supposed to be a 14 foot channel,which I've traveled several times before, I struck something hard. The keel lock bolt broke, but not after being shoved about an inch through the fiberglass. Water immediately started coming at at the keel hinge bolt, which I immediately tightened and headed for a dock. Once at the dock, I more closely examined the damage, which appears to be threefold.1. As mentioned, the keel locking bolt holes are deformed. These are normally above the water line. 2. The sealing gaskets or washers on either side of the keel locking bolt crumbled, thus the leaking around the bolt. (The arrangment is a rubber or some other compound washer with a cone-shaped larger metal washer cupped over it so as to compress it inward when tightened.) I capped this off with marine epoxy in an attempt to reestablish the seal as well as possible, but water is still seeping in appaently.3. The fiberglass making up the leading edge of "box" into which the upper end of the keel rises to be locked no longer is shiny and the color of honey, but looks like dusty powder. I assume this is the result of the keel having slammed back into the upper position after the impact. I can only see one side of this, but it feels "intact" and was completely dry. This area is lower than the keel locking bolt, but I believe is above the water line.Of course, I've not been able to inspect the keel itself, but don't expect damage there.I could not remove the boat from the water yesterday due to lightning, and will likely not be able to do so again today. My fear is that the seeping leak will lower the boat significantly in the water that it will either pour in through the keel locking bolt holes or even start seeping in through "injury number 3". I have no electric bilge pump on board nor plumbing to get water out of the boat. (Have always used portable electric and/or manual bilge pump and bucket to remove excess water.)Can anyone comment on (a) steps I can take to keep the boat afloat until I have opportunity to take her out, (b) whether damage to this extent is "fatal" or fixable, and (c) any other pertinent advice.Moral of the story: Don't lock the keel unless you need it locked, i.e. where a knockdown is legitimately possible. If it had not been locked, I know I would have raised it while motoring through this channel. It is likely that the obstruction was a large submerged tree...could have even been a vehicle...washed down in recent flooding. Fortunately, I had all tools on board including TWO 15/16" wrenches necessary to manipulate the keel bolt. Otherwise, there would have been immediately serious problems. EVERYONE should have a bilge pump, electric or manual and operable from the cockpit.