I always seem to get the weird problems that no one has ever seen before. My fuel gauge works fine with the ignition on. As soon as I start the engine it pegs over to full...

I can't seem to find anyone who's ever encountered something like this. Including my mechanic. And I can't think of a single thing that could cause this...

What is Bat voltage with key ON, and what is voltage once started?
Measure at the fuel gauge or ignition key purple wire

Also post pic of fuel sender?

Boat is rack stored and the drives are off the boat getting new clutches put in them. So I can't put it in the water to start it... if I believe my mechanic it should be all done and put back together by the end of the day Thursday.

ok, I can wait