Water seeping thru box stinger

[Reel Smoker]

My boat sits in the water most of the time ,I noticed in the past that water was seeping thru a small crack towards the end of the port side box stringer.At one point I noticed my brass thru hull in the front compartment was loose and water was coming in thru there between the hull and the liner, I tightened it and 5200 the threads. It stopped for a while now I noticed it again, I glassed the side of the box stinger to keep it from leaking inside but its coming from another area about 8 inches from the patch.Any suggestions ? RS.