Self FixerCom.DE

Oil Pressure testBF75A BF90A outboard motors

1. Check the engine oil level.
2. Remove the 4 x 8 mm screw and oil pressure switch.
3. Install a pressure gauge attachment (special tool) on an oil pressure gauge that has a scale calibrated to a maximum of 196-490kPa (2-5kgf/cm2, 28-71psi) to the outboard motor.
   
   CAUTION:
   Tighten the gauge attachment to 9 N-m (0.9 kgf-m, 6.5 Ibf-ft)
   Over-tightening will damage the threads.
4. Remove the propeller.
   Run the outboard motor in a test tank with the water level at least 4 inches above the anti-ventilation plate.
   
   Allow the engine to warm up to normal operating temperature.
5. Check the oil pressure with the engine speed at 950 +/- 50 min (rpm).
   It should be 147 kPa (1.5 kgf/cm2, 21 psi) or above.
6. If the oil pressure is less than the specification, check the oil pump rotors and body for wear.
7. Clean the oil pressure switch threads and apply liquid sealant (THREE BOND 1215) to the threads. Tighten the oil pressure switch to the specified torque.
   
   TORQUE: 9 Nm (0.9kgf-m, 6.5 Ibf.ft)

CAUTION:

Updated on: Tuesday, November 10, 2020