
ON THE WATER
SECTION 3
9CMD-4081850 / 90-860094030 SEPTEMBER 2003 Page 39
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ENGINE WARM UP
CAUTION
Improper or no warm-up of engine can seriously impair the Iife of your diesel
engine.
1. After starting, ensure all instrumentation is functioning properly.
NOTE: It is very important that any engine be warmed up before applying full load.
2. Operate engine for 1 or 2 minutes at fast IDLE (1000-1500 rpm) or until engine
temperature reaches operating temperature 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.
3. Inspect the power package for fuel, oil, water and exhaust leaks.
4. 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 Cummins MerCruiser
Diesel dealer / distributor if you are unable to determine the problem.
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STARTING A WARM ENGINE
1. Turn on and run engine compartment bilge blower for five minutes (if so equipped). Or,
open engine hatch to air out bilge before attempting to start engine(s).
2. Turn key switch to the RUN position.
3. Turn key switch to START position. Release the key and allow the switch to return to
RUN position when the engine starts.
4. Ensure charge indicator and oil pressure warning lamps are off.
5. Ensure all instrumentation is functioning properly and indicating normal readings.
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