Further to Mark's exploratory drilling, I found standing water underneath the main sink. I sponged it up and water was back the next day. The source appears to be from the "hidden bilge", as I had similar puddles appear in the center bilge by the bilge hose joint. The water is definitely not from the sink drain or the fresh water foot pump. I spoke to Mark and am going to borrow his outboard siphon bulb pump. Plan is to drill a hole in the plywood base that holds the foot pump large enough for the hose to fit through, and then see how far I can snake the hose. I may try and pull that entire base assembly just to see what the opening to the water source looks like.

Rich - have you got visibility under your sink to the "hidden bilge" since you've got your floor apart? Is there a path for water to get under the sink area from there?

Bill


[This message has been edited by whk (edited 04-17-2006).]