
01-20-2010
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Senior Member
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Join Date: May 2002
Posts: 2,021
Rep Power: 11
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I had a boat with a cast iron keel, and it's hard to imagine it developing a major crack that requires replacing the entire keel. Cast iron keels are often crude castings that must be faired to make them smooth. The cast iron keel on my boat occasionally developed long cracks in the fairing materials, but the crack was only in the fairing material, and not in the keel itself. If you haven't already done so, I'd suggest you chisel away any fairing materials around the crack, down to the bare metal, and see if the crack is in the casting itself. If not, then all you have to do is remove all loose materials and re-fair it. I tapped on the keel with a hammer to find the loose materials. If it had a ringing sound, the material was not loose. If it sounded dull, it needed to be removed. I used a chisel to cut away the loose material.
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