CD30c seawater entry points?

[S/V Ethan Grey]

I motored our CD30c yesterday for about 2 hours and once we got back to the dock I realized that the bilge was more than 1/2 way filled with water. I manually pumped it out and took a quick look around the boat for any leaks but didn't spot any. This afternoon I went back out to the boat to see if there was any water in the bilge and it was about 1/2 way filled again. It didn't rain last night so I'm not sure where the water could be coming from. I did another look around the boat but didn't see anything leaking. I'm going back out tomorrow to check the bilge. In the meanwhile, I'm looking through the manual and trying to figure out ways that water can intrude into the boat other than a leak topside. Here's what I've gathered that I need to take a close look at tomorrow:

Water access points:

Above waterline:
Manual bilge pump through hull
Electric bilge pump through hull
Engine cooling water exhaust port

Below waterline:
Rudder shaft
Propeller shaft (stuffing box)
Cockpit sole scuppers seacock (port & starboard)
Head saltwater intake seacock
Waste holding tank discharge seacock
Engine cooling water intake seacock

Anything else I should look at?

Thanks!

[mgphl52]

Below waterline:
Propeller shaft (stuffing box)

Number 1 suspect!

[Steve Laume]

Taste it first.

There is a high probability that it is the stuffing box needs to be adjusted. It is easy to spot a drip if you stare at the stuffing box for a bit. It will be more pronounced when the engine is running.

You never considered, water from within. Those plastic water tanks are known to have some issues at their age. Check the connection points for all hoses and the unused ports on the tanks. You will have to unscrew the plywood covers under the settee cushions to do this. That is why you will want to taste the water before you go to the effort. It is also a really manly exercise to dip a finger in the bilge and then put it in your mouth but it will rule out the tanks, Steve.

[Neil Gordon]

>> It is also a really manly exercise to dip a finger in the bilge and then put it in your mouth ...<<

Smell it first, to rule out a holding tank leak, before you taste it.

I agree that the stuffing box is a good (and easy) place to start looking ... a good flashlight helps.

Seacocks, too... whether open or closed can leak. Those leaks aren't hard to spot.