Carburetor adjustment (Fig. 9)
WARNING
● The cutting attachment may be spinning
during carburetor adjustments.
● Never start the engine without the complete
clutch cover. 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
adjusted. A further adjustment may be required,
according to climate and altitude. The carburetor
has one adjustment possibility:
T = Idle speed adjustment screw.
T
Fig. 9
Idle speed adjustment (T)
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 Tanaka dealer.
Air fi lter (Fig. 10)
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.
Fig. 10
Cleaning the air fi lter
Remove the air fi lter cover and the fi lter. 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 by a new one. A damaged
fi lter must always be replaced.
NOTE
Saturate the element in 2-cycle oil or the
equivalent. Squeeze the element to distribute the
oil completely and to remove any excess oil.
Spark plug (Fig. 11)
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 0.024״ (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)
Fig. 11
9
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000BookTHT-210SBUS.indb9000BookTHT-210SBUS.indb9 2009/10/2714:56:052009/10/2714:56:05
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