If it is not the color of antifreeze, I would assume it is from the raw water cooling side of the system. I would look around your heat exchanger for drips on the bottom side or the hoses going to it from the raw water pump.
Also look for drips on the back side of the raw water pump, there is a port in the casting on the drive side so if the seal leaks it will not leak water into your engine oil through the drive.

Also, that it is collecting there and not running to the bilge is not right. There should be a drain hole at the forward (low) end of the sump that drains to the bilge.

Your hull number is close to mine. The pan under the engine is isolated from the bilge except for the conduit where the battery cables run through. At a high enough level, the liquid can pass to the bilge.

If you are in a salt water environment, the first thing to consider is if the water under the engine is salty or not. Disgusting as it may be, I have touched a drop of water to my tongue on several occasions to make that determination. Have a swig of rum handy if you are worried about germs.

When we had a leaking hose connection of the raw water feediing into the exhaust muffler, it leaked on the the galley sole more than under the engine, but that is a place to look, too.

I think you will need to remove the access covers fore and aft of the engine and run it while you carefully observe. Don't wear your necktie while you are looking. ;)

Good luck!

Roland,
If the water is collecting in the pan, then it is not coming from a water tank or anywhere else along the hull. As Duane mentioned, the pan is isolated from and above the hull. Water flowing from areas aft would flow under the pan into the bilge. Water collecting in the pan is coming from the engine or something connected to it. (the pan is designed to catch oil drips, so that they don't get into the bilge, and get pumped overboard) Steve is right, if it is clear, then it's coming from the raw water side of the cooling system. Take a flashlight and look around/under the engine while it is running. Water drops reflect the light, and it'll be easier to spot them. Most likely a hose clamp is loose. Hope this helps.

I too have been experiencing some water in the same area. I have checked and it is not salt water, it is not antifreeze and now I am thinking it is either condesation from the air conditioning unit or the aft freshwater tank.

Did you recently top off the water tanks? If the water tastes fresh, it could be from a leaking 'O' ring seal on the top of one of the water tanks. My starboard tank would leak after it was filled. It took me months to figure out what was happening and I only caught it when I went to change the zinc in the HE and noticed a small pool of water in the 'nook' just by the side of the HE. I was on fresh water at the time so the taste test did not work too well at that time.
John Meyer 2135
Out cruising, currently in Marina Coral, Ensenada, Mexico

Roland,

If the stuffing box leaks heavily the water can get slung around and drip down off the engine but, the bulk of it should not collect under the engine as the stuffing box is disigned to drain to the bilge below the the pan under the engine. It sounds to me you still have a raw water leak on the raw water cooling side of the engine to me, either the raw water pump, lines to the heat exchanger or the heat exchanger itself. Again the raw water pump would be one of my first suspects, the drain on the drive is hard to see without a light and mirror and usually will not leak staticly, some clue could be green streaks around the front of the engine near the pump. One way to see if it is leaking would be to wrap a paper towel around the drive, tape it in place and chech and see if it is wet after a period of motoring.