Oil System Troubleshooting; Low Oil Warning System Is Activated - Mercury Optimax 115 Service Manual

OIL INJECTION

Oil System Troubleshooting

Low Oil Warning System is Activated

Problem
Low oil level in engine
oil reservoir but not low
in remote oil tank
Note: Oil level in engine
oil reservoir should be
up to the fill cap
Air was never purged from
engine oil tank
Fill cap is leaking air on re-
mote tank
Remote oil hoses blocked or
punctured
Restricted oil outlet filter in re-
mote oil tank
Air leak in upper portion on
the oil pickup tube
Faulty pressure check valve.
Located in engine at end of
(black without blue stripe) re-
mote oil hose
Continuity
Oil Float switch is faulty. Re-
place switch
Page 3C-16
Problem
Low oil level in en-
gine oil reservoir and
also remote oil tank
Refill both oil tanks.
Purge air from en-
gine oil tank. Refer
to procedure
Purge air from engine oil tank.
Refer to procedure
Caps on remote tank must be
sealed and installed tight
Check hoses for a kink or
leakage
Remove filter and clean
Replace tube
Replace check valve
Continuity
Remove screw and pull out
the oil float switch from the
tank. Check switch again for
continuity
Float in oil tank is faulty. Re-
place oil tank
Problem
Oil level is not low
in either tank
Disconnect blue
wires going to the
low oil float switch in
the engine oil reser-
voir. Check switch
for continuity
No Continuity
Blue wire is shorted to ground
Check continuity with engine run-
ning and electrical system under
load. Refer to Service Bulletin 98-3
No Continuity
Problem
Oil leaks out of
exhaust
or #6 cylinder
Pulse hose and
oil supply hose
are reversed
Boat oil tank is
mounted higher
than pulse hose
fitting on engine
and oil tank is
over-filled
Continuity
90-855347R1 JANUARY 1999