Mercury 225 EFI Service Manual page 178

WIRING DIAGRAMS
If no water is coming out of the water pump indicator hole, or flow is intermittent, stop engine
and check cooling water intake holes for obstruction. If no obstruction is found, this may indicate
a blockage in the cooling system or a water pump problem. Have the outboard checked by
your dealer. Operating the engine without adequate cooling water pressure will overheat the
engine.
If the warning signals stop and a steady stream of water is coming out of the water pump indica-
tor hole, return engine to normal operation. If the warning system is activated repeatedly, have
the outboard checked by your dealer.
ALARM – LOW OIL RESERVE – OUTBOARD 2 STROKE
The bell and oil icons are displayed and the warning horn begins 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 sound-
ing continuously and the Engine Guardian System will start limiting engine power.
The engine mounted oil reservoir tank along with the remote oil tank will have to be refilled
(refer to Fuel & Oil Section).
ALARM – OIL PUMP FAULT
The Bell, Engine and oil icons are displayed and the warning horn begins sounding continuous-
ly 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. Consult your dealer for assistance.
ALARM – ENGINE OVERSPEED
The Bell icon is displayed and the warning horn begins sounding continuously to inform the
driver that the engine speed exceeded the maximum allowable RPM. The system will automat-
ically reduce the engine speed to within the allowable limit.
NOTE: Engine speed should never reach the maximum limit to activate the system unless the
propeller is ventilating, an incorrect propeller is being used, or the propeller is faulty.
Page 2D-28 90-884294 OCTOBER 2001