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Yanmar 4BY2 - Starting and Stopping Procedures

Yanmar 4BY2
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Starting at Low Temperatures
NOTICE: NEVER use an engine starting aid
such as ether. Engine damage will result.
Comply with local environmental
requirements. Use optional glow plugs (if
equipped) to avoid starting problems and
white smoke.
To limit white smoke, run the engine at low
speed and under moderate load until the
engine reaches normal operating
temperature. A light load on a cold engine
provides better combustion and faster
engine warm-up than no load.
Avoid running the engine at idling speed any
longer than necessary.
SHUTTING DOWN THE
ENGINE
Under normal operating conditions, shut
down the engine by turning the key switch to
OFF.
There will be a delay of up to 3 seconds after
turning the key to OFF. This is normal and
allows the ECU computer to store data. Wait
at least 10 seconds after the engine stops
before turning the battery master switch to
OFF.
Emergency Shut Down
NOTICE: NEVER use the emergency stop
switch for a normal engine shut-down. Use
this switch only when stopping the engine
suddenly in an emergency.
1. Ensure lanyard is connected to the
emergency stop switch.
2. Attach the lanyard to a secure place on
the operator’s clothing or life vest - not
where it might tear away.
NOTICE: Do not cut or re-tie the
lanyard. If it is too long, shorten it by
knotting or looping it. Test the
emergency engine shut off switch
before each outing.
3. Disconnecting the clip from the stop
switch will stop the engine.
NOTICE: 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.
ENGINE OPERATION
BY Series Operation Manual 35
© 2008 Yanmar Marine International

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