I have twin 8.1 Crusaders 2003. I have been having an issue with the port side engine having the oil pressure light and alarm go off and sending the boat into limp mode. There is no issue with the oil pressure. The gage reads 70 PSI. I changed the sensor on both engines and now when I turn the key on the starboard engine the oil pressure gage pins to 80psi. Then when you start the engine the needle goes to zero as soon as you inch the rpm up the alarm goes off and the oil pressure light comes on. I changed the sending unit and still the same thing happens. I am not sure if I fixed the port side issue, but do not know how to find what is happening to the Starboard engine now?