Mercury D4.2L Manual page 54

CE298
STARTING COLD ENGINE
IMPORTANT: Always check all fluid levels before starting engine. Refer to Maintenance Chart.
1
Turn on and run engine compartment bilge blower (if so equipped) for five minutes. Or, open engine hatch
to air out bilge before attempting to start engine(s).
2
If engine has not been run for a period of time and will not readily start with the standard starting procedure,
there is a hand pump/primer knob located on the fuel filter header. Move knob up and down four or five strokes.
Attempt to start engine following normal procedure.
3
Turn key switch to the RUN position. Observe indicator lamp for glow plugs, if so equipped. When cylinder
temperature is great enough to sustain combustion, the indicator lamp will cease to be lighted and the engine
can be started.
4
Turn key switch to START position. Release key when engine starts and allow switch to return to RUN posi-
tion.
5
Check to ensure all instrumentation is functioning properly and indicating normal readings. Check to ensure
charge indicator and oil pressure warning lamps go out. Within seconds after starting the engine, oil pressure
should exceed 10 psi (69 kPa) minimum. If the oil pressure does not meet these minimum limits, stop the engine,
locate and correct the problem, or see your Authorized MerCruiser Dealer if you are unable to determine the
problem.
Do not increase the engine speed until the oil pressure gauge indicates normal. Shut the engine down
if oil pressure does not register on the gauge within 20 to 30 seconds after start.
CE31
ENGINE WARM UP
Improper or no warm-up of engine can seriously impair the Iife of your diesel engine.
1
After starting, check to ensure all instrumentation is functioning properly. Run engine at idle RPM until engine
temperature is within normal operating range. It is very important that any engine be warmed up before applying
full load. The warm-up period provides time for the lubricating oil to establish a film between moving parts.
NOTE: Engine warm-up time during cold weather can be reduced by operating vessel at reduced engine speed.
Commence normal vessel operation when systems reach operating temperatures.
2
After the engine has reached operating temperature, oil pressure should be within range listed in the engine
specifications chart. Stop the engine if oil pressure is not within this range. Locate and correct the problem, or
see your Authorized MerCruiser Dealer if you are unable to determine the problem.
54
CAUTION
CAUTION