pump location
on my 1999 GW 263 Chase, the fresh water pump is inside the center console. Directly under where my fuse panel is, there is a removable cover that once removed, it will provide access all the way to the bottom of the boat located almost dead center of the Hull.
Within this access is my fresh water pump, the trim tab resovoir and the seacock valves for the toilet that was installed mine, but has since been removed.
I hope this helps! Let me know if there is anything else that you need.
Stephen