Warning System - Electric Starting Models - Mercury 40 4-Stroke Manual

Hide thumbs Also See for 40 4-Stroke:

Manual (134 pages)

Operation and maintenance manual (110 pages)

Table Of Contents

Table of Contents

Function

Engine Over Temperature

Low Oil Pressure

ENGINE OVERHEAT

If the engine overheats, immediately reduce throttle speed to idle. Shift the outboard into neutral and

check for a steady stream of water coming out of the water pump indicator hole.

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 while overheated 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.

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.

LOW OIL PRESSURE

The warning system will be activated if the oil pressure drops too low. First, stop the engine and check

the oil level. Add oil if necessary. If the oil is at the recommended level and the warning horn continues

to sound, consult your dealer. Engine speed will be limited to 2000 RPM, however you should not

continue to run engine.