Husqvarna 223LX, Operator'S Manual

Page: 17 / 72

English
– 17
MAINTENANCE
1157404-49 Rev. 1 2015-01-22
Carburetor
Adjustment of the idle speed
Before any adjustments are made, make sure that the air filter
is clean and the air filter cover is fitted.
Adjust the idle speed using the idle adjustment screw T, if it is
necessary to readjust. First turn the idle adjustment screw T
clockwise until the cutting attachment starts to rotate. Then
turn the screw counter clockwise until the cutting attachment
stops. The idle speed is correctly adjusted when the engine
will run smoothly in every position. The idle speed should also
be well below the speed at which the cutting attachment starts
to rotate.
• The basic carburetor settings are adjusted during testing
at the factory.
Recommended idle speed: See the Technical data
section.
Muffler
CAUTION! Some mufflers are fitted with a catalytic
converter. See chapter on Technical data to see whether your
machine is fitted with a catalytic converter.
The muffler is designed to reduce the noise level and to direct
the exhaust gases away from the operator. The exhaust
gases are hot and can contain sparks, which may cause fire
if directed against dry and combustible material.
Some mufflers are equipped with a special spark arrestor
screen. If your machine has this type of muffler, you should
clean the screen at least once a week. This is best done with
a wire brush. On mufflers without a catalytic converter the
screen should be cleaned weekly, or replaced if necessary.
On mufflers fitted with a catalytic converter the screen should
be checked, and if necessary cleaned, monthly.
If the screen
is damaged it should be replaced. If the screen is
frequently blocked, this can be a sign that the performance of
the catalytic converter is impaired. Contact your dealer to
inspect the muffler. A blocked screen will cause the machine
to overheat and result in damage to the cylinder and piston.
CAUTION! Never use a machine with a defective muffler.
Cooling system
To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
1 Air intake on the starter.
2 Fins on the flywheel.
3 Cooling fins on the cylinder.
4 Cylinder cover (directs cold air over the cylinder).
Clean the cooling system with a brush once a week, more
often in demanding conditions. A dirty or blocked cooling
system results in the machine overheating which causes
damage to the piston and cylinder.
!
WARNING! If the idle speed cannot be
adjusted so that the cutting attachment
stops, contact your dealer/service
workshop. Do not use the machine until it
has been correctly adjusted or repaired.
!
WARNING! Mufflers fitted with catalytic
converters get very hot during use and
remain so for some time after stopping. This
also applies at idle speed. Contact can result
in burns to the skin. Remember the risk of
fire!
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