Yanmar 1GM, Operation Manual

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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.