YANMAR Diesel Engine 1GM, 2GM, 3GMD, 3HM. Manual - part 9

Important

Do not stop the engine with the decompression lever. If the decompression
lever used to stop the engine, fuel will spray out and accumulate on top of
the pistons. This will create the danger of an explosion the next time the
engine is started.

2) Be sure to close the kingston cock after stopping.   

3) Drain out the cooling water. In winter and in periods of

col

d weather when there is the possibility that the cooling water may freeze, the cooling water
should be drained out after use.

3-a)
Open up the cylinder body side cock located below the intake silencer and drain out the water
in the cylinder.

3-b)
Open up the cock in the lower part of the exhaust manifold and drain the water from the
manifold. (for 3GMD, 3HM)

3-c)
Turn the crankshaft 2-3 times by starter motor to remove any water remaining in the cooling
pump.

4) While the engine is still warm, wipe off any dirt and grime that has accumulated.

5) Turn off the battery switch.

Note
When stopping the engine with the starter switch "ON", the tube oil pressure warning buzzer
will sound. This does not indicate engine trouble.

V III. Storage

[8-1.] Storing

Whenever the engine will not be used for several months, use the following procedure to
properly store it.
This minimizes corrosion and deterioration.

1) Drain fuel completely from fuel tank, otherwise moisture from the fuel system will mix
with the fuel.

2) Wash the cooling system with clean tap water and drain out the cooling water from the
engine completely.

2-a)
Cylinder body

2-b) Exhaust manifold.

2-c)
Cooling water pump Remove the cover of the
cooling water pump and drain out the water inside of
the cooling water pump.

3) Apply an anti-rust oil to any parts which rust
easily.

4) Since the battery will automatically discharge
itself if left, disconnect when fully charged, wash the
exterior and store in a dry, well-aired place.
Re-charge once a month during storage.

1. Cooling water pump

5) Tape to seal air inlet, exhaust pipe, and fuel tank cap.

6) Clean the engine throughly. Touch up any painted surfaces that are scratched or chipped.

7) If boat must be stored outside, cover it with waterproof material.

[82.] Removing engine from storage

1) Wipe off anti-rust oil and check that the remote control system move smoothly.

2) Wiring the battery.

2-a) Rewire as shown in the wiring diagram.

2-b) Make sure wires are connected to the correct terminals.

Important

If wires are wrongly connected the A.C. generator may break.

2-c) Terminals must be covered and protected.

3) Unseal all openings sealed in step 1-5).

4) Also, observe points in section IV. Starting the new engine for the first time. For an ever
better service, ask advice from a Yanmar dealer.