If posable take a video (light on ) and hold it in the bilge access and shoot a video of it on. Have someone turn it on and SLOOWWLEY move it around . do it 3 or so times trying to take slightly different angles . Hook it up to the TV and sit back and watch (on slow motion) you should be able to see any problems.I tell members of my website this all the time with great results. You can also add food coloring to a full livewell (with nothing on) and see if it leaks into bilge. if so it is a leak after water coming in.