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OM-C3 11/21
DO NOT fill above the crosshatch pattern (A) or the
FULL mark, whichever is present. Oil levels anywhere
within the crosshatch are considered in the acceptable
operating range.
4. During the first 20 hours, avoid prolonged periods of
engine idling. If engine will idle longer than 5 minutes,
stop engine.
5. After the first 100 hours (maximum), change engine oil
and replace engine oil filter (A). (See CHANGE ENGINE
OIL AND FILTER in Lubrication and Maintenance/250
Hour Section.) Fill crankcase with seasonal viscosity
grade oil. (See DIESEL ENGINE OIL, in Fuels,
Lubricants, and Coolant Section.)
NOTE: Some increase in oil consumption may be
expected when low viscosity oils are used. Check oil
levels more frequently. If air temperature is below -10°C
(14°F), use an engine block heater.
Engine Operation
Remove oil filter
A- Oil filter
6. Watch coolant temperature gauge (A) closely. If coolant
temperature rises above maximum coolant temperature
(see GENERAL ENGINE SPECIFICATIONS in
Specifications Section), reduce load on engine. Check
sea (raw) water strainer for plugging on heat exchanger
engines. Unless temperature drops quickly, stop the
engine and determine the cause before resuming
operation.
7. Check poly-vee belt for proper alignment and seating
in pulley grooves. Two zinc plugs (A) are installed in the
sea water cooling system to help neutralize the corrosive
action of salt water on internal cavities of marine engine
components. The reaction of the zinc, when exposed to
the salt water, causes the plugs to deteriorate instead of
critical engine components.
8. After the first 50—100 hours or 2—4 weeks of
operation, remove zinc plug from each heat exchanger
end cap (B) and inspect for corrosion to get an idea of rate
of deterioration in sea water. If rate of corrosion is slight
at 50—100 hours or 2—4 weeks initial inspection, zinc
plugs should be inspected at 250 hour intervals thereafter.
(See INSPECT AND REPLACE ZINC PLUGS in
Lubrication & Maintenance/250 Hour Section)
A- Zinc plugs
B- End cap
