Did you ever get this figured out?
If not, it could be like mine with a bad Bassett T-valve, and a shower of water sprays out the weep holes near idle. Or could it be leaking at the rub rail. Mine did that too, up until the other day when I grabbed a hose and some silicone, and started sealing any place that I saw water come in. Now I can stand there with a hose all day long, and not a trickle running down the transom.

My hand hole cover was also leaking the first time out, kept my fuel filter nice and cool though

cause the water sprayed directly on it. Just had to tighten that bolt up a little bit and it's all good now. I'm just glad I haven't managed to sink the boat yet, with all these leaks.
Good luck.