Join Date: Feb 2000
Location: Annapolis, Md
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I must admit this is one of the stranger threads that I have seen but sorting through this it sounds like you have a whole range of issues and that few of them will be resolved by filling the bilge with epoxy.
If I remember correctly the Pearson 365 has an encapsulated lead keel. If that is the case, the anatomy of the keel is that there is a structural encapsulation envelope that is molded as a part of the hull. The lead is inserted into the cavity and adhered with a polyester resin slurry, and then there is a membrane over the keel that forms the bottom of the bilge. On the Pearsons with encapsulated keels that I have direct experience with the membrane at the top of the keel is quite thin and therefore easily ruptured in a grounding.
If you are experiencing leaks you probably have several problems here. First of all, the encapsulation envelope has been breeched allowing water into the space between the ballast keel and the encapsulation envelope. Since the encapsulation envelope is structural, the areas were there are hair line cracks need to be ground back to solid glass free of delamination and cracking. The ground area should be ground out with tapered edges at a 1:12 ratio, and then glassed over with epoxy and cloth. That alone is a pretty major job since Pearson's glass work in the keel stub is pretty crude with lenses of unreinforced resin and dry glass, so that once you open a hairline crack you are likely to need to open a large area.
The second likely repair is to the bond between the ballast keel and the envelope. In a hard grounding the ballast keel typically shifts sheering the bond between the encapsulation and the ballast. This bond is a structural element partially resisting the impact of a future grounding. Once the cavity fills with water it is very hard to re-establish the bond.
The keel should be tapped out looking for delaminated and separated areas. If voids are present they should be drained and the bond re-established.
Lastly the membrane should be ground out and reglassed to establish a water tight envelope above the ballast.
Filling the void behind the ballast keel is merely cosmetic at that point. That said, that void forms the perfect bilge pump pick-up point so I personally would not fill it in.
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Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay