Inlet Air Heater; Glow Plugs - Yanmar 2TNV70 Operation Manual

CAUTION
For maximum engine life, Yanmar
recommends that when shutting the
engine down, you allow the engine to
idle, without load, for 5 minutes. This
will allow the engine components that
operate at high temperatures, such as
the turbocharger (if equipped) and
exhaust system, to cool slightly before
the engine itself is shut down.
OFF (Figure 10, (1)) - When you turn the key to
this position the engine shuts down. Electric
current to the gauges and indicators is shut off.
You can insert and remove the key in this
position.
ON (Figure 10, (2)) - This is the position the key
will be in when the engine is running. When the
engine is not running, use this position to
energize the gauges, indicators, electric fuel
pump and auxiliary devices.
CAUTION
NEVER hold the key in the START
position for longer than 15 seconds or
the starter motor will overheat.
START (Figure 10, (3)) - Turn the key to this
position to start the engine. As soon as the
engine starts, release the key and it will
automatically return to the ON position. Some key
switches may be equipped with a feature that
prevents you from turning the key to the START
position while the engine is running. You cannot
turn the key to the START position without first
returning the key to the OFF position.
HEAT (Figure 10, (4)) - You must turn the key to
the HEAT position to activate the inlet air heater.
The indicator will flash for several seconds when
you turn the key to HEAT. You can turn the key to
START when the indicator goes out.
TNV Operation Manual

Glow Plugs

Glow plugs are installed in the cylinder head swirl
chambers to help make the engine easy to start
in cold temperatures. During the engine starting
sequence, the glow plugs are activated for
several seconds. After the preheat / heat indicator
goes out, the engine can be started.

Inlet Air Heater

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(1)
The inlet air heater (Figure 11, (1)) is located on
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the intake manifold. Heated inlet air helps the
engine to start easier in cold weather. During the
engine starting sequence the inlet air heater is
activated for several seconds. After the pre-heat /
heat indicator goes out, the engine can be
started. The inlet air heater is standard
equipment with every engine.
PRODUCT OVERVIEW
0000027A
Figure 11
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