1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 64Get this manual
The oil pressure switch is on top of the oil pump, and it receives voltage signal from the ECU If oil pressure drops below PSI (27,6 6,9 kPal, the switch completes ground circuitThe ECU senses this, and after programmed delay, stores service codeIt also turns on the System Check "NO OIL" light, and puts the engine into S.L.O.W INote See the oil flow diagram at the end of this manualS.L.D.WTM Warning System