Yanmar 6LY3 series Operation Manual page 57

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1. Fresh Water Pump
2. Coolant Tank
3. Seawater Drain Cock
4. Fresh Water Drain Cock
5. Seawater pump
Figure 5
2. Remove the fill cap (Figure 6, (1)) on
the heat exchanger (Figure 6, (3)) by
turning the cap counterclockwise 1/3 of
a turn.
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Figure 6
3. Pour coolant mix slowly into the heat
exchanger (Figure 6, (3)) so that air
bubbles do not develop.
Pour until the coolant overflows from the
filler port.
6LY3 Operation Manual
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BEFORE YOU OPERATE
4. After filling the heat exchanger, replace
fill cap and tighten it firmly
(Figure 6, (1)). Failure to do so will
cause coolant leakage. To replace the
cap, align the tabs (Figure 6, (2)) on
the bottom of the cap with the notches
on the filler port and turn clockwise 1/3
of a turn.
5. Remove the coolant recovery tank cap
(Figure 7, (2)) and fill with coolant mix
to the lower limit (Figure 7, (4)).
Replace cap. Never fill to the upper
limit (Figure 7, (3)).
Coolant recovery tank capacity: 0.8 L
(1.7 pints)
6. Check the rubber hose (Figure 7, (1))
connecting the coolant recovery tank to
the heat exchanger. Be sure the hose
is securely connected and there is no
looseness or damage.
If leaks develop in the hose or at the
connection, an excessive amount of
coolant will be lost.
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Figure 7
When engine coolant is supplied for the
first time or when it must be replaced,
conduct a trial operation of the engine for
about 5 minutes and check the quantity of
engine oil and coolant.
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