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•
Do maintenance on the spark plug when:
•
the power level in the engine is low.
•
it is hard to start the engine.
•
the engine does not work correctly at idle speed.
•
Do a check of the saw chain lubrication each time
you refuel. See
To do a check of the saw chain
lubrication on page 20 .
To adjust the idle speed
Make sure that the air filter is clean and the air filter
cover is attached before you adjust the idle speed.
1. Turn the idle adjustment screw, which is identified
with a "T" mark, clockwise until the saw chain starts
to turn.
2. Turn the idle adjustment screw, which is identified
with a "T" mark, counterclockwise until the saw chain
stops.
3. The idle speed must be below the speed when the
saw chain starts to turn. The idle speed is correct
when the engine operates smoothly in all positions.
To do maintenance on the spark
arrester mesh
•
Use a wire brush to clean the spark arrester mesh.
(Fig. 57)
To do maintenance on the spark plug
CAUTION:
spark plug. Make sure that the replacement
is the same as the manufacturer supplied
part. An incorrect spark plug can cause
damage to the product.
1. If the product is hard to start or operate, examine
the spark plug for unwanted materials. To decrease
the risk of unwanted material on the spark plug
electrodes:
a) make sure that the idle speed is correctly
adjusted.
b) make sure that the fuel mixture is correct.
c) make sure that the air filter is clean.
2. Clean the spark plug if it is dirty. Make sure that the
electrode gap is correct. (Fig. 59)
3. Replace the spark plug when it is necessary.
To clean the air filter
1. Remove the air filter cover and remove the air filter.
(Fig. 60)
2. Clean the air filter with warm soap water. Make sure
that the air filter is dry before you install it.
3. Replace the air filter if it is too dirty to fully clean it.
Always replace a damaged air filter.
862 - 004 - 03.04.2023
Use the recommended
To sharpen the saw chain
The cutter
The cutting part of the saw chain is called the cutter and
consists of a cutting tooth (A) and the depth gauge (B).
The cutters cutting depth is determined by the difference
in height between the two, the depth gauge setting (C).
(Fig. 61)
When you sharpen a cutting tooth there are four
important factors to remember:
•
Filing angle.
(Fig. 62)
•
Cutting angle.
(Fig. 63)
•
File position.
(Fig. 64)
•
Round file diameter.
(Fig. 65)
To sharpen the cutting teeth
Use a round file and a file gauge to sharpen the cutting
Saw chain filing and saw chain combinations
teeth. See
on page 22 for information on the recommended
dimension of the file and gauge for the saw chain
installed on your product.
(Fig. 66)
1. Make sure that the saw chain has the correct
tension. A chain without the correct tension moves
to one side does and not sharpen correctly.
2. Use the file on all the teeth on one side. Then use
the file on the cutting teeth from the inner face and
decrease the pressure in the reverse direction.
3. Turn the product on the opposite side and use the
file on the teeth.
4. Use the file to keep all teeth the same length.
Replace a worn saw chain when the length of the
cutting teeth decreases to 4 mm (5/32 in).
To adjust the depth gauge setting
Sharpen the cutting teeth before you adjust the depth
To sharpen the cutting teeth on page
gauge setting. See
19 . When you sharpen the cutting tooth (A), the depth
gauge setting (C) will decrease. To maintain optimal
cutting performance, the depth gauge (B) has to be filed
down to achieve the recommended depth gauge setting.
Saw chain filing and saw chain combinations on
See
page 22 to find the correct depth gauge setting for your
particular chain.
(Fig. 67)
(Fig. 68)
Note:
This recommendation assumes that the length
of the cutting teeth is not reduced excessively.
19
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