Oil Injection
90-8M0050731 MAY 2011 Page 3C-15
Oil System Troubleshooting
Low Oil Warning System is Activated
Component or Problem Possible Causes Corrective Action
Low oil level in the engine‑mounted oil reservoir,
but sufficient level in the vessel‑mounted remote
tank
Air was not purged from the
engine‑mounted oil reservoir
Purge air from the engine‑mounted oil
reservoir by operating the engine with
the cap removed.
Fill the engine‑mounted oil reservoir
tank with oil.
Fill cap is leaking air on the
vessel‑mounted remote oil tank
Inspect the vessel‑mounted remote
tank cap seals.
Ensure the cap is installed tightly.
Replace components as necessary.
Remote oil hose is blocked, cut, or
porous
Inspect hoses for nicks, cuts, or kinks.
Pressure check each hose for leaks.
Replace components as necessary.
Oil outlet filter in the vessel‑mounted
remote oil tank is restricted
Remove, inspect, and clean the filter.
Replace if necessary.
Oil inlet filter in the oil hose before the
engine‑mounted oil reservoir is
restricted
Replace the oil filter.
Air leak in the upper portion on the oil
pickup tube
Replace the pickup tube.
Pressure check valve is faulty. (Located
on the engine at the end of the black
hose, no stripe.)
Replace the check valve.
Hose connections Check all hose connections for leaks.
Low oil level in engine‑mounted oil reservoir and
vessel‑mounted remote oil tank
Lack of proper periodic maintenance
Fill both tanks. Purge the air from the
engine‑mounted oil tank and oil hose.
Refer to the Operation Manual for the
maintenance schedule.
Oil level in both tanks is OK
Low oil switch in the engine‑mounted oil
reservoir is faulty
Perform a resistance test on the low oil
switch. Replace components as
necessary.
Low oil switch in the engine‑mounted
reservoir is disconnected
Check the condition of the connection
and correct as necessary.
Bad ground
Check the sensor connection for
proper ground. Correct as necessary.
Oil leaks out of exhaust or #6 cylinder
Pulse hose and oil supply hose are
reversed
Correct the hose orientation.
Vessel‑mounted oil tank is mounted
higher than the pulse hose fitting on the
engine, and the oil tank is overfilled
Correct the oil tank installation
location. Clean internal engine
components.
A deck fill kit is installed. This may
cause overfilling due to improper use.
Low oil level in engine‑mounted oil reservoir
when engine is not in operation
Oil reservoir check valve is leaking
Perform engine‑mounted oil reservoir
check valve test. Check valve should
open at 27.57 ± 10.34 kPa
(4 ± 1.5 psi).
Oil reservoir leaking air when cold
Pressurize the oil system with the
leakage tester. Check for leaks when
the engine is cold.
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