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Intermittent maintenance
• Have an approved service center repair or
replace the muffler after 50 hours of
operation.
• 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
the saw chain lubrication on page 30 .
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 clean the spark arrester screen
1. Use a wire brush to clean the spark
arrester screen.
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.
653 - 006 - 10.02.2020
To do a check of
Use the recommended
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.
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.
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.
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).
When you sharpen a cutting tooth there are
four important factors to remember:
A
B
C
25
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