Went to Maine Thurs. Pulled boat out of water onto trailer at ramp, removed drain plug , must have had 5-8 gallons of water come out. Today ,just for the heck of it ,put water in the boat , let it sit . Checked to see if there was any water leaking out . Nothing ,not a drop . So ,I would like to know where did or how all the water got into the boat . Any ideas ? Thanks in advance .