Mercury 150 EFI Service Manual page 212

RESERVE OIL LOW (a)
This message will appear and the warning horn will begin sounding a series of four beeps
every two minutes to inform the driver that the oil level is critically low in the engine mounted
oil reservoir tank. When the oil level gets close to empty, the horn begins sounding continu-
ously and the Engine Guardian System will start limiting engine power. The display shows
percent of reserve oil that's remaining.
The engine mounted oil reservoir tank along with the remote oil tank will have to be refilled.
FAULT-OIL PUMP (b)
This message is displayed and the warning horn begins sounding continuously to inform
the driver that the oil pump has stopped functioning electrically. No lubricating oil is being
supplied to the engine. Stop the engine as soon as possible. The Engine Guardian system
will start limiting the engine power.
NOTE: The throttle will have to be returned to idle to reset the system.
FAULT-INJECTOR (c)
This alarm informs you if one or more of the fuel injectors have stopped functioning electri-
cally.
FAULT-IGNITION (d)
This alarm informs you that a problem has developed in the ignition system.
FAULT-WATER TEMP (e)
This message informs you that the sensor (located in the paddle wheel) for measuring
outside lake/sea water temperature is not functioning. Two possible things to check for
are 1, Check the wiring going to the paddle wheel. 2, If the paddle wheel is not being used
or If only one paddle wheel is used for duel engine setup, edit the corresponding tachome-
ter calibration to delete the water temp sensor.
90-883728 JULY 2001
a
b
c
d
e
WIRING DIAGRAMS
Page 2D-59