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WARNING
When the engine is idling the cutting attachment must under no
circumstances rotate.
NOTE
Do not touch the High speed adjustment (H) and the Low speed
adjustment (L).
Those are only for Hitachi Authorized Service Centers.
If you rotate them, it will cause a serious damage to the machine.
Air fi lter (Fig. 34)
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.
Remove the air fi lter cover (41) and the 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.
Spark plug (Fig. 35)
The spark plug condition is infl uenced by:
○ An incorrect carburetor setting.
○ Wrong fuel mixture (too much oil in the gasoline)
○ 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 0.6 mm.
The spark plug should be replaced after about 100 operation hours
or earlier if the electrodes are badly eroded.
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.
41
40
Fig. 34
Fig. 35
Oiler port (Fig. 36)
Clean the chain oiler port (42) whenever possible.
Guide bar (Fig. 37)
Before using the machine, clean the groove and oiler port (43) in the
guide bar.
Side case (Fig. 38)
Always keep the side case and drive area clean of saw dust and
debris. Periodically apply oil or grease to this area to protect from
corrosion as some trees contain high levels of acid.
NOTE
Pull up the front hand guard towards you and release the brake
to remove or install the side case.
Fuel fi lter (Fig. 39)
Remove the fuel fi lter (44) from the fuel tank and thoroughly wash it in
solvent. After that, push the fi lter into the tank completely.
44
NOTE
If the fuel fi lter (44) is hard due to dust and dirt, replace it.
42
Fig. 36
43
Fig. 37
Fig. 38
45
Fig. 39
13
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