Husqvarna 129R Operator's Manual page 13

• Examine the spark arrester screen.
• Examine the fuel filter.
• Examine the fuel hose for damage.
• Examine all cables and connections.
50 hours maintenance
• Have an approved service center repair or replace
the muffler.
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.
• Adjust the idle speed with the idle adjustment screw
T which is identified with "T" mark.
• The idle speed is correct when the engine operates
smoothly in all positions. The idle speed must be
below the speed when the cutting attachment starts
to turn.
1. Turn the idle adjustment screw clockwise until the
cutting attachment starts to turn. (Fig. 38)
2. Turn the idle adjustment screw counterclockwise
until the cutting attachment stops.
To do maintenance on the spark
arrester screen
Use a wire brush to clean the spark arrester screen.
(Fig. 39)
To clean the cooling system
Clean the parts of the cooling system with a brush.
(Fig. 40)
The cooling system include the air intake on the starter
(A) and the cooling fins on the cylinder (B).
To examine 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. Make sure that the
spark plug is installed with a supressor.
Speak to your servicing dealer for more
information.
1. Examine the spark plug when:
a) the engine is low on power.
b) the engine is not easy to start.
c) the engine does not operate correctly at idle
speed.
2. If, the engine is not easy to start or operate, examine
the spark plug for unwanted materials. To decrease
the risk of unwanted material on the spark plug
electrodes:
191 - 008 - 24.06.2022
Use the recommended
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.
3. Clean the spark plug if it is dirty. Make sure that the
electrode gap is correct. Refer to
page 14 . (Fig. 41)
4. Replace the spark plug when it is necessary.
To do the maintenance to the air filter
To clean the air filter
1. Remove the air filter cover and remove the air filter.
(Fig. 42)
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.
4. If your product has a foam air filter, apply air filter oil.
Only apply air filter oil to a foam filter. Do not apply
oil to a felt filter.
To apply air filter oil to the air filter
CAUTION:
oil on foam air filters. Do not use other types
of oil.
WARNING:
body.
1. Remove the air filter cover and remove the air filter.
(Fig. 43)
2. Put the air filter in a plastic bag.
3. Put the air filter oil in the plastic bag. (Fig. 44)
4. Push the plastic bag to make sure the oil supplies
equally across the air filter.
5. Push on the air filter, while in the bag, to remove
the air filter oil that is not necessary. Remove the air
filter from the bag.
6. Install the air filter.
To add grease to the bevel gear
Make sure that the bevel gear is filled 3/4 full with bevel
gear grease.
(Fig. 45)
To remove the locknut
CAUTION:
you use it for approximately 10 times.
Technical Data on
Always use special air filter
Do not get oil on your
Replace the locknut when
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