Description Nm lb‑in. lb‑ft
Screws 10 88.5 –
3. Use a cable tie to secure the oil level sensor module to the relay bracket.
4. Connect the oil level sensor harness to the engine harness.
IMPORTANT: The intake runner fasteners must be tightened to the specified torque in the specified order. Refer to the
appropriate service manual.
5. Install the starboard air intake runner. Refer to the appropriate service manual.
Oil Pressure Sensor
The oil pressure sensor measures the engine oil pressure. In the event of low oil pressure, the PCM will limit engine power,
based on the amount of oil pressure available at a specific engine RPM.
The oil pressure sensor is located next to the oil filter, near the top of the port side of the engine.
Port top view of engine (V8 shown, V6
similar)
a - Oil pressure sensor
b - Oil filter
Oil Pressure Sensor Test
Monitor the oil pressure (data item OilPressure) on the CDS G3 Live Data screen. The oil pressure should decrease as the
engine warms, and should increase as the engine RPM is increased. Typical oil pressure readings are shown in the following
table.
Condition
Specification
At idle RPM (oil cold or warm*) 150–650 kPa (21–95 psi)
At WOT RPM (oil cold or warm*) 400–900 kPa (58–130 psi)
At idle RPM (oil hot) 60–150 kPa (8–22 psi)
At WOT RPM (oil hot) 350–550 kPa (50–80 psi)
*When the oil is cold, the pressure will be toward the upper end of the range. As the oil warms, the pressure will be toward the
lower end of the range.
CDS G3 Interface Kit 8M0138392
If the oil pressure sensor does not indicate a pressure change with the engine running at a normal operating temperature,
shake or move the sensor harness and connector. If the pressure begins to change, look for broken, loose, or corroded wires.
Continue testing with the engine OFF:
1. Disconnect the engine harness connector from the sensor.
2. Visually inspect the pins of the oil pressure sensor and the wires coming from the engine harness connector. Look for
broken, bent, or corroded pins at the oil pressure sensor and loose, broken, or corroded wires at the engine harness
connector.
Sensors
Page 5A-30 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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