noticed that everytime i take my boat out, back end is sitting lower and lower in water. have a '76 20ft. proline cuddy with 200 johnson. quesion is: the two holes on transom wall seem to be sitting below water level, last year were above and water would flow in and out. bilge is pumping dry. 1. could i be taking on water?? if so where?? have a storage area/livewell in front, removed access panel and sucked out 2.5gallon of water, don't know where it came from. i'm not too familiar with layout of boat, 2. are there any other cavities in boat that are connected to bilge?? 3. should those two drain holes on transom ever be plugged up?? thanks in advance.