Let me warn you that there will be water already trapped under the sole of the bilge. As a matter of fact, there will be many gallons of water trapped in the boat's hull stringers under the cabin liner that will eventually make its way down into the bottom of the bilge to replace water that may be removed. Some of this water is fouled by seawater micro-organisms and will stink. Opening up the liner may release unwanted smells. Water will not drain as you have observed as the hull under the liner will likely be full of water already. If you estate your problem or project it may help you get better responses. There is a couple of postings about the h34 bilge in the forum; go to Boat Info, 34, Projects and see if those are helpful. good luck.