ENGINE OPERATION
GM Series Operation Manual 45
12/05
SHUTTING DOWN THE
ENGINE
Never stop the engine abruptly during
operation. Yanmar recommends that when
shutting the engine down, allow the engine
to run, without load, for 5 minutes. This will
allow the engine components that operate
at high temperatures, such as the exhaust
system, to cool slightly before the engine
itself is shut down.
1. Reduce the engine speed to low idle
and put the shift control lever in
NEUTRAL.
2. Accelerate from low speed to high
speed and repeat five times. This will
clean out the carbon from the cylinders
and the fuel injection nozzles.
3. Allow the engine to run at low speed
(approximately 1000 min
-1
) without
load for five minutes.
4. With the key in the ON position, pull
and hold the engine stop knob
(Figure 5, (1)) until the engine has
come to a complete stop. After the
engine has stopped, turn the key switch
to OFF.
Note: Continue to hold the engine stop
knob until the engine is
completely stopped. If the knob
is released before the engine
has completely stopped, it may
restart.
Figure 5
Figure 5
1 – Engine Stop Knob
2–Bulkhead
3 – Control Cable
5. Turn off the master battery switch (if
equipped).
6. Remove the key.
7. Close the fuel cock.
8. Close the seacock (if equipped).
Be sure to close the seacock. Neglecting
to close the seacock could allow water to
leak into the boat and may cause it to
sink.
Note: The engine may be stopped by
raising the decompression lever,
but avoid doing so except in
times of emergency. The
decompression lever releases
compression pressure in the
cylinder which causes the
engine to stop. However, fuel
injection does not stop and fuel
continues to be pumped into the
cylinder. This can lead to
abnormal combustion when the
engine is restarted and is not
desirable.
GM_OM.book 45 ページ ２０１３年６月１０日 月曜日 午後２時２６分
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