2004 SR Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 72Get this manual
IGNITION AND ELECTRICAL OIL PRESSURE CIRCUIT
OIL PRESSURE CIRCUIT
Oil Pressure Caution System Operation
The oil pressure switch is turned off when oil pressure is above the correct level 27.6 kpa (4.0 psi)When oil pressure is below the current level and the switch is turned on, the oil pressure caution lamp turns onAt the same time, the caution system an the CDI limits engine speed to approximately 2000 rpmThe oil pressure caution lamp will turn on for about seconds when starting the engine to verify that the bulb is in operating condition