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CD629
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 equipped) for five minutes. Or, open engine hatch to
air out bilge before attempting to start engine(s).
2 On D3.6L and D4.2L only, set “Cold Start Lever” if temperature is below 50° F (10° C).
3 After a lengthy layup (several months or more) pre-lubricate the turbocharger and engine. To do this, hold
the STOP switch toggle lever DOWN while you simultaneously turn the key switch to START position for 15 se-
conds. This will rotate the starter motor and engine/oil pump. During this process the engine will not run because
no fuel is injected. Allow the starter motor to cool down for one minute and repeat the above described process.
To avoid overheating the starter motor, do not engage starter motor for more than 15 seconds each time. Proceed
to next step after a slight increase in oil pressure is observed.
4 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.
5 Turn key switch to the RUN position. Observe indicator lamp for glow plugs. When cylinder temperature is
great enough to sustain combustion, the indicator lamp will cease to be lighted and the engine can be started.
6 Turn key switch to START position and release when engine fires. Check to ensure charge indicator and oil
pressure warning lamps go out.
CAUTION
Improper or no warm-up of engine can seriously impair the Iife of your diesel engine.
NOTE: On D3.6L and D4.2L only, reset Cold Start Lever when engine idles smoothly.
7 Run engine at Idle rpm until engine temperature is within normal operating range.
CAUTION
Never attempt to shift unit unless engine is at idle rpm. Damage to drive unit could occur.
8 Check to ensure all instrumentation is functioning properly and indicating normal readings.
CE31
ENGINE WARM UP
CAUTION
Improper or no warm-up of engine can seriously impair the Iife of your diesel engine.
9 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.
10After 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.
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