I recently purchased a 2000 225 Explorer and I am in the process of upgrading/repairing systems to get ready for the water.
Made new dash, added switches and breakers, added charging ports for electronics, new stereo, additional chart plotter, relocated transduces to the step as per this forum, replaced nav lights, replaced fish box pump and wife still pissed about getting sent into the bilge for that.
My only remaining problem is that I do not know what powers the freshwater pump, it doesn't appear on the dash labeling, it does not run and it doesn't appear on the breaker/fuse box on starboard side of transom. Unless someone knows or has a schematic, I will have to send wife into bilge again to disconnect pump and tone it out. Don't know how many of those favors I have left before I have to replace wife as well. Will be most difficult to find another wife who can fit into the bilge.