I had expected to find some corrosion on the seacocks. After all, the sea loves to eat metal, however I was not prepared for what I found. Part of it was corrosion and part of it was bad construction.
First, let me start by saying that all the seacocks were replaced with the appropriate units including the correct bases. You are looking at almost 1K of bronze parts. Hell, I have bought jewelry for my wife cheaper than this. I am glad she did not see that bill!!
Anyway, I Started one hot august day by looking at what I had and what I could keep. Took a pipe wrench and decided to remove the two 1/2" valves. One feeds water to the head and one to the engine. Now keep in mind that in this confined space, I could barely hook the wrench and take a push, but wham! the small water intake valve for the engine broke off. WTF, I said in several languages!! Looked like the bronze street elbow was screwed about 2 turns only to the thru hull and the sea had pretty much eaten all the thickness of the thru hull right at the thinest part, the threaded area.
. Moved to the front head and the valve for the head water intake also popped of the thru hull without a wimper. Now, I know better than apply brute force to these items as I expected them to be fairly delicate, but this was scary. After reading an article by Maine Sail on Hunter Owners web site, I understood that the Thru hulls have one tipe of threads and the valves have another. ( one is straight and one is tapered) There is no way in hell that you could screw these two items together more than a couple of threads, yet many builders in the 70's did just that to save $$.
So after some additional research, I decided that the only way to feel secure on this boat was to replace all the seacocks with the appropriately threaded base and matching bronze seacock.