Mercury 30 Service Manual

3C-4 - OIL INJECTION SYSTEM 90-826148R2 MARCH 1997
Theory of Operation
The oil injection system delivers a oil mixture thru a
variable ratio oil pump.
The engine mounted oil reservoir holds 50.5 (1.5 Li-
ters) which will provide 4.5 hours of running time at
wide open throttle.
A low oil warning horn will be activated when 7 fl.oz.
(200cc) of oil remains in the reservoir. This will pro-
vide approximately 30 minutes of wide open throttle
running before oil is depleted.
Thecrankshaftdrivenoilpumpinjects oilintothefuel
before the fuel pump.
Oil Injection System
1. Oil Reservoir
The oil reservoir gravity feeds oil to the oil pump.
The reservoir contains a low oil sensor which ac-
tivatesawarninghornwhen7fl.oz.(200cc)ofoil
remains in the reservoir.
2. Oil Injection Pump
The crankshaft driven oil pump is a variable ratio
oil pump which provides an oil/fuel mixture of
100:1 @ idle and 60:1 @ WOT.
3. Check Valve Vent
Providesairtooilreservoirforproperventingand
alsopreventsoilleakswhenoutboardistiltedfor-
ward.
4. 2 PSI Check Valve
This valve prevents gasoline from being forced
into oil line.
5. Low Oil Sensor
Whenoillevelinreservoirdropstoapproximately
7 fl. oz. (200cc), the sensor will signal warning
module to activate warning horn.
6. Timing and Protection Module (TPM) for
(S/N-0G589999 & Below)
Iftheoilinthereservoirdropstolessthan7fl.oz.
(200 cc), the low oil sensor in the reservoir will
signalthewarningmoduletoactivatethewarning
horn. If the powerhead temperature should ex-
ceed 190°±8° F (88° ±13° C), the overheat tem-
peraturesensor inthe waterjacket cover willsig-
nal the warning module to activate the warning
horn.

Mercury 30 Specifications

General

Brand	Mercury
Model	30
Category	Outboard Motor
Language	English