[jclark003]

By mid do you mean the keel bilge in the engine room? Or the forward bilges under the salon? If the 42 is laid up the same as the 43 the two spaces are bulkhead separated so it will help narrow things down. I just had the exact same problem and it was the hot water heater relief valve leaking. I opened and closed it a couple of times and it reseated itself.

If the leak is not obvious one trick is to sprinkle talcum power up and down the bilge spaces and then look for tell tails where the water is leaking. should give you a clue.

Good luck