YANMAR Diesel Engine 1GM, 2GM, 3GMD, 3HM. Manual - part 7

1, Astern
2. Neutral
3. Ahead
4. Control Handle

[6-7.] Tuning

To allow the lube oil to reach all parts, turn in the
following sequence.

1) Place the control lever in "NEUTRAL".

2) Raise the decompression lever and leave it in the "no
compression" position.

3) Open the kingston cock.

4) Turn on the battery switch, insert the key into the
switch, and turn it to "ON".

FOR 1GM

5) Push the starter button and simultaneously pull the
"STOP" wire; turn the engine over 5-10 times and
make sure there are no abnormal sounds.

FOR 2GM/3GMD/3HM

Important

When turning by hand, turn to the left (counter clockwise) when viewed
from the front. If turned in the wrong direction, the impeller of the
cooling water pump may be damaged.

1. Push Button

DIRECTION OF ROTATION

V II. Method of operation

Caution

Before starting the engine
reconfirm that there are no
tools, etc. left in the engine
area, especially areas where
there are revolving parts.

3. Full Speed     1. Neutral    2. Slow Speed

(7-1.) Starting

1) Electric starting

1. Warm up knob

1-a)
Pull out the engine warm up knob and place the control
lever in the "FULL SPEED" position.

1-b)
Place the decompression handle down to the
"COMPRESSION" position.

Within 15 seconds

1-c)
Place the starter key in the "ON" position.

1-d)
Press the starter button to start the engine.

For IGM

Important

(1) RELEASE the push button

when engine starts.

If the push button is released

before engine starts, wait until starter motor and
engine stop running before trying again.

(2) Do not operate starter motor more than 15
seconds at a time. If engine does not start, wait at
least one minute before trying again.

For 2GM/3GM/3HM

Note
In cold weather.
When starting is difficult in cold weather,
raise the decompression handle to the "no
compression" position and turn the starter
motor over. After the engine gains
momentum, return the decompression
lever to the "compression" position. The
amount of electricity needed will be less,
and engine starting will be facilitated.

2) Emergency start
1GM, 2GM, 3GMD model can be started
in an emergency by manual starting.

2-a)
Pull out the engine warm up knob and place the control lever in the "FULL SPEED" position.
And also place the starter key in the "ON" position in order to charge the battery after engine
starts.