Cleaning The Air Filter - Hitachi Koki CS 40EA Manual De Instrucciones

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until the cutting attachment stops. You have reached
the correct idle speed when the engine runs smoothly
in all positions well below the rpm when the cutting
attachment starts to rotate.
If the cutting attachment still rotates after idle speed
adjustment, contact Hitachi Authorized Service
Centers.
WARNING
When the engine is idling the cutting attachment
must under no circumstances rotate.
NOTE
Some models sold in areas with strict exhaust
emission regulation do not have high and low
speed carburetor adjustments. Such adjustments
may allow the engine to be operated outside of their
emission compliance limits. For these models, the
only carburetor adjustment is idle speed.
If you are not familiar with this type of adjustment,
please ask for assistance from your Hitachi Authorized
Service Centers.
Air fi lter (Fig. 36)
The air fi lter (40) must be cleaned from dust and dirt
in order to avoid:
○ Carburetor malfunctions.
○ Starting problems.
○ Engine power reduction.
○ Unnecessary wear on the engine parts.
○ Abnormal fuel consumption.
Clean the air fi lter daily or more often if working in
exceptionally dusty areas.
Cleaning the air fi lter
Remove the air fi lter cover (41) and the air fi lter (40).
Rinse them in warm soap suds. Check that the fi lter
is dry before reassembly. An air fi lter that has been
used for some time cannot be cleaned completely.
Therefore, it must regularly be replaced with a new
one. A damaged fi lter must always be replaced.
41
Spark plug (Fig. 37)
The spark plug condition is infl uenced by:
○ An incorrect carburetor setting.
○ Wrong fuel mixture (too much oil in the gasoline)
16
40
Fig. 36
○ A dirty air fi lter.
○ Hard running conditions (such as cold weather).
These factors cause deposits on the spark plug
electrodes, which may result in malfunction and
starting diffi culties. If the engine is low on power,
diffi cult to start or runs poorly at idling speed, always
check the spark plug fi rst. If the spark plug is dirty, clean
it and check the electrode gap. Readjust if necessary.
The correct gap is 0.024" (0.6 mm). The spark plug
should be replaced after about 100 operation hours or
earlier if the electrodes are badly eroded.
0.024"(0.6 mm)
NOTE
In some areas, local law requires using a resistor
spark plug to suppress ignition signals. If this
machine was originally equipped with resistor spark
plug, use same type of spark plug for replacement.
Oiler port (Fig. 38)
Clean the chain oiler port (42) whenever possible.
Guide bar (Fig. 39)
Before using the machine, clean the groove and
oiler port (43) in the bar with the special gauge
off ered as an optional accessory.
Fig. 37
42
Fig. 38
43
Fig. 39

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