I just purchased a new to me boat. It is a 94 model in excellent shape. It has a 09 model 50hp Mercury engine on it. I noticed the trim gauge was not working on the boat and the man selling it on consignment said he figured it just had a loose wire. I check all of the wiring at the gauge and it has power but when I searched for a sending unit back on the engine I could not find one. I searched out the parts manual and it does not show one for this engine. My s/n is 1B742942. Does any one know of a sending unit that would work with this engine?