bilge drainage

Hello everyone,I'm new here.I have a 74 V20 with a outboard.When I was out chunking for stripers I keep washing deck down with a 5 gal bucket.When I got in and started to wash down the boat I noticed that there was water in the bilge.I had to sit on motor to get the water to get high enough to drain into the pump area.After doing that there was still about 10 Gal still in bilge.I began to think I may have a leak.So I got a shop-vac and got the rest of it out.Went back the next day and there was only maybe a gallon in bilge.Just wondering if anyone had this problem and how they corrected it.It seems to me that the drain hole allowing water into the pump area between the batteries is to high.The base where the pump is mounted appears to be about 2" above bilge and the drain hole seems to be about 3".Hope someone can help me out here.