Returning The Engine To Service - Yanmar 6LY3 series Operation Manual

LONG-TERM STORAGE
1. Loosen the seawater drain cocks
(Figure 1, (1)) and (Figure 2, (1)) and
drain the seawater.
Figure 1
Figure 2
If no liquid comes from the drain cocks, it
may be necessary to use a stiff wire to
remove any debris to allow drainage.
2. Loosen the 6 bolts attaching the side
cover of the seawater pump, remove
the cover and drain the water from
inside.
Retighten the bolts when finished.
3. Close the drain cocks.
Note: Do not drain coolant (fresh water
cooling system). If the coolant is
drained, the cooling system
components could corrode.
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Before placing the engine in storage,
perform the following:
1. Clean the outside of the engine wiping
off any dust or oil.
2. Drain the fuel or fill the tank completely
to help prevent condensation inside the
tank.
3. Refill the heat exchanger with engine
coolant. See Filling Heat Exchanger
with Engine Coolant on page 48.
4. Cover the turbocharger, exhaust pipe,
etc. with vinyl sheets and seal them to
prevent moisture from entering.
5. Completely drain the bilge. Put the boat
in dry dock, if possible.
6. Waterproof the engine room to prevent
rain and seawater from entering.
7. During long-term storage, charge the
battery once a month to compensate
for the battery's self-discharge.
RETURNING THE ENGINE
TO SERVICE
1. Replace the engine oil and engine oil
filter before running the engine.
2. Supply fuel if the fuel in the fuel tank
was removed, and prime the fuel
system.
3. Confirm that there is engine coolant in
the engine.
4. Operate the engine at idle speed for
one minute.
5. Check fluid levels and check engine for
leaks.
6LY3 Operation Manual