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Old 27-09-2010, 09:16   #16
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Join Date: Oct 2007
Location: San Antonio, TX/Port Aransas, TX
Boat: 1990 Macintosh 47, "Merlin"
Posts: 2,274
Thanks to all for suggestions.

We finally got this apart. Thanks for all of the advice. Here's what we did:

First I saturated the area with calcium hydroxide on Saturday - and kept it wet with a cloth. Calcium hydroxide has a pH of 12 (on a log scale of 1-13, with 7 being neutral). Calcium hydroxide is pickling lime, or you can find it at pet stores where it's called "Kalkwasser" - it's used to increase the pH and calcium in a reef tank. It doesn't take much, it saturates at 1 tablespoon per gallon.

Then, yesterday, I heated up the tubing with a torch, and sprayed the casting with CRC Freeze Off. A bunch of wacks with a screwdriver and hammer, and it came apart.
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