Every 500 Hours of Operation
Perform the following maintenance every
500 hours of operation or every 2 years,
whichever comes first.
• Checking the Fuel Pump and Fuel
Lines
• Draining and Refilling Closed Cooling
System (Engine Coolant)
Checking the Fuel Pump and Fuel
Lines
See your authorized Yanmar dealer or
distributor.
Draining and Refilling Closed
Cooling System (Engine Coolant)
1. Disconnect battery negative (-) cable.
2. Remove the engine cover.
3. Remove the coolant pressure cap from
heat exchanger.
4. Remove the heat exchanger to access
the cylinder block drain plug behind it.
Note: The charge air cooler has been
removed for clarity of Figure 10.
5. WARNING! NEVER remove the
coolant filler cap if the engine is hot.
Steam and hot engine coolant will
escape and seriously burn you.
Allow the engine to cool before
attempting to remove the filler cap.
Remove drain plug (Figure 10, (1))
from the engine block. Allow coolant to
drain into a container of appropriate
size.
0003660
(
1
)
Figure 10
6. Install cylinder block drain plug with a
new gasket.
7. Install heat exchanger. Ensure the drain
cock (Figure 11, (1)) on the heat
exchanger is closed.
0006621
(1) (2)
Figure 11
PERIODIC MAINTENANCE
BY Series Operation Manual 55
© 2008 Yanmar Marine International
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