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Mercury 140 Service Manual

Mercury 140
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FEATURES AND CONTROLS
26
Warning System
Function Sound Description
Engine Over Temperature Continuous Engine Overheat
Low Oil Level Intermittent Low Oil Level
When the ignition key is initially turned on, the warning horn will sound for a moment as a test to show the system
is working. Failure of this test indicates a problem. Have the outboard checked by your dealer.
ob00364
ENGINE OVERHEAT
If the engine overheats, immediately reduce throttle speed to idle. Shift outboard into neutral and check for a steady
stream of water coming out of the water pump indicator hole.
ob00331
If no water is coming out of the water pump indicator hole or flow is intermittent, stop engine and check the cooling
water intake holes for obstruction. If no obstruction is found, there may be a blockage in the cooling system or a
water pump problem. Have the outboard checked by your dealer. Operating the engine while overheated will cause
engine damage.
NOTE: Should overheating occur and you are stranded, stop the engine and allow it to cool down. This will usually
allow some additional low speed (idle) running time before the engine starts to overheat again. Operating an
overheated engine will cause engine damage.
If a steady flow of water is coming out of the water pump indicator hole and the engine continues to overheat,
consult your dealer. Operating an overheated engine will cause engine damage.
LOW OIL LEVEL
The warning system will be activated when the oil level in the engine mounted oil reservoir drops to the reserve
level. There is still oil reserve remaining for 30 minutes of full speed operation.
NOTE: The engine mounted oil reservoir along with the remote oil tank will have to be refilled (refer to Fuel & Oil.)

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Mercury 140 Specifications

General IconGeneral
Horsepower140 hp
Cylinders4
Fuel Induction SystemElectronic Fuel Injection (EFI)
SteeringHydraulic
Shaft Length20 in / 25 in
Full Throttle RPM5000 - 6000 RPM

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