9
English
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
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 the same type of spark plug for
replacement.
Cutting blade (Fig. 12)
The blades are installed to the blade guide with the
four,
fi
ve or six bolts. Those bolts are tightened with
a clearance so that the blades can move smoothly.
Fig. 12
When clearance is too small
The blades do not move properly and the sliding
surfaces may seize.
When clearance is too large
The blades are poor in sharpness.
To adjust the blade clearance
1. Loosen the blade
fi
xing nuts.
2. Fully tighten the blade
fi
xing bolts and then
loosen them approx. 5/8 turn.
3. With the bolts set at that position, tighten the
blade
fi
xing nuts.
Be sure to replace blade guide
fi
xing bolts when they
are loosened, worn or damaged. Also be sure to
replace damaged cutter blade.
Lubricating the blade (Fig. 13)
During trimming, sap adhering to the blade edge will
increase load.
Use machine oil (or bicycle oil or the like) to lubricate
the blade and wipe the blade with a cloth. To prevent
the blade from rusting, be sure to lubricate the blade
after use and when it will not be used for an extended
period of time before placing it in the blade case.
Fig. 13
Gear case (Fig. 14)
Apply a good quality lithium based grease through the
grease
fi
tting until a small amount comes out between
the cutting blades and the gear case. Lubricate the
grease from the grease nipple (indicated by an arrow)
next to the gear case using a commercially available
cartridge grease gun.
Fig. 14
000Book̲TCH22EAP2(50ST)̲US.indb 9
000Book̲TCH22EAP2(50ST)̲US.indb 9
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2014/12/16 10:15:37
