I have a 88 catalina 25 kubota motor, hull 613, don't have a oil pressure gauge, just a light which I am not sure works, I have read the archieves but couldn't find where anyone actually installed a guage at the engine instrument panel, has anyone done this "upgrade"? If so what did you use and where did you connect from on the engine, did you have to replace the old sending unit?, boat is 160 miles away otherwise I may be able to diagnose some of this. thank you, appreciate your help. Bobg