My trim gauge stopped working on my SX-M drive. I shorted the two wires as others had suggested and bygolly the gauge works. Checked the sending unit with a meter and got nothing. I started looking for a replacement and found units that apparently go over the swivel bolts ( multi-point inside drive bolts on each side of the gimbal housing), these appear to engage the bolt and when the bolt moves so does the sending gauge. BUT mine is different. Mine has a lever that makes contact with the unit as it goes up and down. I have checked and cannot find a replacement on any diagram or parts manual. Suggestions? Here is a picture of mine (the only numb on it is 911800 which means nothing?)