keel

This question sounds so silly, or elementary, that I didn't want to actually put it out on the forum. I have no problems with the fact that I'm a novice, but some things are probably really simple and I don't want to ask a stupid question.....but here one comes... There is a "Whirling" sound...

Does anyone know where I can get a copy (electronic) of the schematics for the keel for a 1987 O'Day 322? I am having to have some work done on the keel and the yard wanted to know if a copy of the schematics was available.

Just acquired a Macgregor Venture 21 about 2 weeks ago. Knew going in the craft needs a good bit of work, particularly below the waterline. Figured working my way through the issues will help me get to know the boat, its good and less good points and parts. Am figuring out what needs doing...