New to boating, own a 96 SEI174. After a day of skiiing and tubing etc, seems to be a lot of water run out of the boat with the plug pulled leaving the launch? Ran the bilge a few times, but must not be deep enough to pump out. What looks like litres, probably isn't. How much water should be in there anyway? Where would the water be coming from? Thanks for the help, much appreciated.