My oil pressure gauge is not functioning. I am trying to determine whether it is the sending unit or the gauge itself. I am a new boater trying to work out some problems. Boat runs fine, motor is practically new (2007). The sending unit looks like an acorn on the diagrams I have but it doesn't show exactly where it is located on the engine itself. I have a Mercruiser 5.0L. Can someone tell me where, exactly, I can find it so I can perform some tests to determine which is failing (the sender or the gauge)? Thanks in advance.
