Engine Starts And Stops; Oil Pressure - Low; Oil Pressure - High - Marine Power 4.3 VORTEC MPI Owner's Manual

12.
Trouble Shooting

Engine Starts and Stops

Possible Cause
Insufficient Fuel Supply
Loss of Ignition Power

Oil Pressure - Low

Possible Cause
Low Oil Level in Crankcase
Excessive Oil in Crankcase
Erroneous Oil Gauge Readings
Incorrect Dipstick
Incorrect Oil Viscosity or Diluted
Oil Pump Malfunctioning
Excessive Bearing Clearance
Low Oil Pressure Will Set a Trouble Code and Will Reduce Engine RPM.
Oil Pressure as Low as of 5 lbs. at Idle is Acceptable. At 2000 RPM 30 lbs. is Acceptable.

Oil Pressure - High

Possible Cause
Oil Too Thick - Wrong Viscosity
Erroneous Oil Gauge Readings
Clogged or Restricted Oil Passage
Oil Valve Relief Valve Stuck Closed
38
Remedy
Approximately 60 PSI. Fuel Pressure Must Be Adequate at Wide Open Throttle at Full Load
Check Ignition Switch, Main Engine Breaker, Engine Harness Connection
Remedy
Refer to Section13: Engine Identification on Page 15
Remove Excess Oil. Refer to Section 13: Engine Identification on Page 15 for Correct Oil Level
Contact Dealer to Perform a Mechanical Oil Pressure Check
See Dealer
Change to Proper Oil
See Dealer
See Dealer
Remedy
Change to Proper Oil
Contact Dealer to Perform a Mechanical Oil Pressure Check
See Dealer
See Dealer
www.MarinePowerUSA.com