Returning The Engine To Service - Yanmar JH Series Operation Manual

LONG-TERM STORAGE
Note: The drain cocks are opened before
shipping from the factory.
Marine gear ZF25A does not have a
drain cock on the marine gear
cooler.
If seawater is left inside, it may freeze and
damage parts of the cooling system (heat
exchanger, seawater pump, etc.) when
ambient temperature is below 32 °F (0 °C).
1. Open the seawater drain cock on the
marine gear cooler (if equipped).
Allow to drain. Open the seawater drain
cock on the air cooler (4JH80, 4JH110
only) and drain. If no water drains, use
a stiff brush to remove any debris.
2. Remove four bolts attaching the side
cover of the seawater pump.
Remove the cover and drain the
seawater.
3. Install cover and tighten bolts.
4. Close all the drain cocks.
150
RETURNING THE ENGINE
TO SERVICE
1. Replace the oil and the 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 1
minute.
5. Check fluid levels and check engine for
leaks.
JH Series Operation Manual