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 in
fl
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 di
ffi
culties. If the engine is low on power,
di
ffi
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
G
B
F
R
E
S
000Book̲THT-210SB̲US.indb 9
000Book̲THT-210SB̲US.indb 9
2009/10/27 14:56:05
2009/10/27 14:56:05
