PERIODIC MAINTENANCE
Periodic Maintenance Procedures
12/05
6LY3 Service Manual
4-33
© 2007 Yanmar Marine International
Long-Term Storage
Observe the following instructions when the engine
is to be stored for a long period of time:
1. Drain seawater in the cold season or before the
long-term storage. NOTICE: NEVER drain
coolant in the cold season or before the
long-term storage. Failure to add antifreeze can
cause major damage to the engine.
2. Clean the engine.
3. Perform the nearest periodic inspection before
storage.
4. Completely drain or completely fill the fuel tank
to prevent condensation in the fuel tank.
5. Disconnect the battery cable from the
negative (-) battery terminal.
6. Cover the silencer and electric parts with a
waterproof cover to prevent water and dirt from
entering.
7. Select a well-ventilated location without
moisture and dust for storage.
8. Recharge battery once a month during storage
to compensate for self-discharge.
9. When storing an engine for a long time, run the
engine periodically, according to the following
procedure, because rust inside the engine, the
rack agglutination of the fuel pump and so on
are likely to occur.
(a) Replace the engine oil and the filter with new
ones before running the engine (See
Replace the Engine Oil and Engine Oil Filter
on page 4-22).
(b) Fill fuel tank if the diesel fuel was removed,
and bleed the fuel system.
(c) Confirm that there is coolant in the engine.
(d) Operate the engine at idle speed for about
5 minutes. Repeat monthly, if possible.
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