Husqvarna 143R-II Operator's Manual page 22

Maintenance
Replace the spark plug. Make sure that the spark plug is assembled with a su-
pressor.
Lubricate the drive shaft.
Make sure that the vibration damping units are not damaged.
Clean the cooling system of the product.
Clean the muffler.
To adjust the carburetor
The basic carburetor settings are adjusted during testing
at the factory. Adjustment must be carried out by a
trained technician.
To do a check of the muffler
WARNING: Do not use a product that has a
defective muffler. Always replace a defective
muffler.
WARNING: Risk of burn or fire. Mufflers with
catalytic converters get very hot during
operation.
WARNING: Risk of fire. The muffler
decreases the noise level and identifies the
exhaust gases from the operator. The
exhaust gases are hot and can contain
sparks.
CAUTION: The spark arrester screen must
be replaced if it is damaged. Do not use a
product if the spark arrester screen on the
muffler is missing or defective.
CAUTION: If the spark arrester screen is
blocked, the product will be too hot. This will
cause damage to the cylinder and piston.
1. Make sure that the muffler is not damaged.
2. Make sure that the muffler is correctly attached to
the product.
To adjust the idle speed
Your Husqvarna product is made to specifications that
decrease harmful emissions.
1. Make sure that the air filter is clean and the air filter
cover is attached before you adjust the idle speed.
2. Adjust the idle speed with the idle speed screw T
which is identified with "T" mark.
22
a) Turn the idle speed screw T clockwise until the
cutting attachment starts to rotate.
b) Turn the idle speed screw T counterclockwise
until the cutting attachment stops.
WARNING: If the cutting attachment
does not stop when you adjust the idle
speed, speak to your servicing dealer.
Do not use the product until it is correctly
adjusted or repaired.
3. 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 rotate.
Technical data on page 26 for the
Note: Refer to
recommended idle speed.
Air filter
• Clean the filter at intervals of 25 hours. Clean more
regularly if necessary.
Daily Weekly Monthly
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X
T