What's with the keel bolts on my Cat 27! I had stainless large keel bolts and nuts on my C&C 24 I recently sold and the ones on this boat are smaller, corroded steel and leaking from the bilge! Can't get a socket on the nuts. Can it be sealed from the outer keel or removed, replaced and resealed? Don't want to put tons of money in this 1977 boat!