Folks, I know this is an old thread but, I have a question along the same line, which I don think was answered here. I have a 1978 Catalina 30. It has a strainer type thru hull fitting. It is a rectangle shaped appendage on the hull bottom. The wooden backing plate inside the boat is rotten and the system is leaking. I wish to replace the entire system with a mushroom style thru hull, with an internal Greco water strainer.
My question is, has anyone taken off one of these external strainers. I would like to get some tips on this. I did remove two small screws on the outside, and one large nut attached to the thru-hull pipe on the inside bilge side.
Any tips or information on this would be greatly appreciated.