May want to look at a replacement sender from another source. What kind of gauge is on the vessel? The maker of the gauge should supply the sender as well. My gauges are from Sierra, available from West Marine. Look just like the originals (I think). Brushed metal look bezels, white numbers on black faces. In any case, you can buy the sender from them as well, as I did for my W58. I would buy a new gauge and sender.
David
Blue Moon