Hitachi CG 24EKS - Page 11

11
English
WARNING
● The cutting attachment may be spinning
during carburetor adjustments.
● Never start the engine without the complete
clutch cover and tube assembled! Otherwise
the clutch can come loose and cause personal
injuries.
In the carburetor, fuel is mixed with air. When the
engine is test run at the factory, the carburetor is
basically adjusted. A further adjustment may be
required, according to climate and altitude. The
carburetor has one adjustment possibility:
T = Idle speed adjustment screw.
Idle speed adjustment (T-Screw)
Check that the air fi lter is clean. When the idle speed
is correct, the cutting attachment will not rotate. If
adjustment is required, close (clockwise) the T-screw,
with the engine running, until the cutting attachment
starts to rotate. Open (counter-clockwise) the screw
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 your Hitachi dealer.
NOTE
Standard Idle speed is 2,800 – 3,200 min
-1
.
WARNING
When the engine is idling the cutting
attachment must under no circumstances
rotate.
Air fi lter (Fig. 20)
The air fi lter 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.
19
Fig. 20
Cleaning the air fi lter
Remove the air fi lter cover and the fi lter (19). Rinse it
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.
Fuel fi lter (Fig. 21)
Drain all fuel from fuel tank and pull fuel fi lter line from
tank. Pull fi lter element out of holder assembly and
rinse element in warm water with detergent.
Rinse thoroughly until all traces of detergent are
eliminated. Squeeze, do not wring, away excess
water and allow element to air dry.
NOTE
If element is hard due to excessive dirt buildup,
replace it.
Fig. 21
Spark plug (Fig. 22)
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,
01EngCG24EKSUS.indd1101EngCG24EKSUS.indd11 2010/03/0410:54:522010/03/0410:54:52