Yanmar 2YM15 Operation Manual page 37

Note: The drain cocks are opened before
shipping from the factory. Close all drain
cocks before filling the system with coolant.
1. Allow the engine to cool.
2. Ensure all drain cocks are closed.
3. Loosen the coolant tank filler cap to
relieve the pressure, then remove the
filler cap. WARNING! NEVER remove
the coolant filler cap if the engine is
hot. Steam and hot engine coolant
will spray out and seriously burn
you. Allow the engine to cool down
before you attempt to remove the
cap.
(1)
(2)
(3)
Figure 11
1 – Filler Cap Tabs
2 – Coolant Filler Cap
3 – Filler Port Notches
4 – Coolant Tank / Heat Exchanger
4. NOTICE: NEVER pour cold coolant
into a hot engine.
Pour coolant slowly into the coolant
tank / heat exchanger (Figure 11, (4))
to avoid air bubbles. Fill until coolant
overflows from the filler port.
YM Series Operation Manual
(4)
0004492
© 2007 Yanmar Marine International
BEFORE YOU OPERATE
5. Align the filler cap tabs
(Figure 11, (1)) with filler port notches
(Figure 11, (3)) and tighten the filler
cap (Figure 11, (2)).
(1)
(2)
(3)
Figure 12
1 – Rubber Hose to Coolant Tank
2 – FULL Mark
3 – LOW Mark
4 – Coolant Recovery Tank Cap
6. Check the coolant level in the coolant
recovery tank. The level should be at
the FULL mark (Figure 12, (2)). Add
coolant if necessary.
Note: The coolant level rises in the
coolant recovery tank during
operation. After stopping the
engine, the coolant will cool down
and the extra coolant will return to
the coolant tank.
NOTICE: NEVER pour cold coolant
into a hot engine.
7. Remove coolant recovery tank cap
(Figure 12, (4)) to add coolant if
necessary. NEVER add water.
8. Replace the filler cap and tighten it
firmly. Failure to do so will cause
coolant to leak.
WARNING! ALWAYS tighten the
coolant tank cap securely after
checking the coolant tank. Steam
can spray out during engine
operation if the cap is loose.
Coolant Recovery Tank Capacity
0.8 L (0.95 qt)
(4)
FULL
LOW
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