And some more are.....
James, Dave offers some good advice. However, I think that first a determination needs to be made as to whether the leak is green water or rain water. Also is the leak confined just the bilge area or is the cabin sole involved also? If it is green water, then check all the areas Dave mentioned in addition to the lower rudder gudgeon, and the lock down bolt(if it is a swing keel). If it is rain water and it affects just the bilge area then I would check the bedding of any hardware that is mounted on or near the toe rail area of the deck. A leak there could enter the boat between the liner and the hull at one point and manifest itself at another point inches or feet away. Check lifeline stanchion bases particularly. It might be possible for water to enter around some of the rub rail mounting screws. IF there is water in the cabin look closely for leaks around the cabin port lites(windows) sometimes these will leak directly into the cabin around the glass weatherstrip or around the frame which can leak between the coach roof and liner with the water entering through one of the light fixtures under the lite. Check also the shroud chainplate eye bolt mountings. Any and all through-bolted fixtures could conceivably provide a path for water entry. Hinges for hatches and lazarettes should also be checked. Cockpit scuppers, their hoses, and clamps might prove to be the source of a leak. One way to check for leaks is to have some one inside the boat with a flash light observing some of the above areas that have access while another person runs water from a hose on the outside. Let the water run on just the lower/deck area first and akkiw time for the water to migrate. This will isolate one section and help pinpoint the leaks area. If you start at the roof, then all sections will be saturated at once and a guessing game as to the origin of the leak will insue. Another option would be to pressurize the inside of the boat, bathe the outside with soapy water, and look for bubbles(too much work). Take some colored chalk or dry-erase markers and draw a line under any of the through-bolts on interior vertical surfaces. If a leak occurs here, the water will wash away a visible track under the bolt and possibly leave a colored trail. Oh, also look for saturated/rotten core in the deck and coach roof. I've rambled on enough here and have probably overlooked some other possibilities. Somebody help me out here. B.J.