What JdMacc said. I filled my boat w/ water- nothing. Checked my screws, and not only were they loose, but I was even missing one. Replaced/tightened and siliconed. No issues since.
Now if you'll excuse me, I'm going to go on an overnight drunk, and in 10 days I'm going to set out to find the shark that ate my friend and destroy it. Anyone who wants to tag along is more than welcome.