do have a question though when key is on my fuel gages peg down not rise i wired as follows from center of sender to gage and outside bolt to tank ground then to boat ground senders look original is that right?
anyone have pics of their old or original senders on tank?
Also do i need to fuse battery hot to ignition or starter hot??? put in a new 750gph automatic bilge pump straight to battery 5amp fuse and cleaned and hung wiring loom. heres pics 
are the tanks grounded? are the senders the same ohm rating as your gauges?
my battery to ignition sw has a fuse.... i fuse everything. in a boat stuff bounces around and if it wears through or gets cut, you have a short and short = fire. not good.
i also have a switch on my dash to manually turn on the bilge pump. it takes a LOT of water back there to actually kick on the floater switch. the pump usually comes with a diagram in the instructions to wire it this way as well.