Just bought a 1984 Hunter 31. Spent a week now throwing 8 garbage bags of junk from the boat, two days of hull cleaning and locker emptying and cleaning and now starting massive interior cleanup. Found after raining 5 of the ports leak, but thats ok, I know where the leak is and what needs to be done. Its water in the back of the quarterberth that keeps showing up. I cant put the matteress back in until its found. Fixed a leak in the port side cockpit drain piping, thought I had found and fixed the problem. Then after cleaning it up, noticed water back again seeping under the plywood wall between the berth and the fuel tank side to the left of the rudder. We have had the panel below the binnacle off and its OK there, no water (except for water from the port locker drain hole! Poured out from the binnacle access when we tested it to see where it went) We have been inside the fuel tank side best we can, found water on top of the fuel tank!, with no idea or indication where it was coming from, all the lines and hoses we can get to are dry, its a mystery. The plywood above is dry. We need to find it. The plywood wall is coming out tomorrow so we have better access and maybe we can find it. We have been cleaning the cockpit area so I know its coming from that water, but will also come in rain as well which we get plenty of in the winter. Anyone have a similar problem or have any ideas??