Help...! Boat is filling with water.

[PJack]

I just bought a 1999 Pro Bass Tracker with aluminum hull and a 90 hp Merc. I cleaned it up, took it to the lake for a spin (yes I had the plug in). After about an hour on the water I opened the rear hatch to just make sure everything was ok and water was half way up the batteries. So I quickly found the bilge pump and turned it on. It took most the water out and I spent another 5 hours on the lake.

This weekend I took it out on the lake again (plug is tight) and I flipped on the bilge pump first thing. In about an hour it was filled up and water was soaking beginning to soak the carpet. The bilge pump is still on and pumping water but it didn't seem to be keeping up.

Brought it home crawled under it to check the hull and I can't find any thing wrong. The only thing I can find wrong is the livewell pump was removed and I haven't bought a replacement yet.

Could the lack of a livewell pump be causing this problem? Any suggestions how to trouble shoot this problem. Thank you for your expert opinions.

Sinking!