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.
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.
Note: Refer to
Technical data on page 23
for the
recommended idle speed.
Cooling system
The product has a cooling system to keep the work
temperature low.
The cooling system has:
C
A
B
E
D
• Fins on the flywheel (A)
• Cooling fins on the cylinder (B)
• Cylinder cover (C) (directs cold air over the cylinder)
• Muffler cover (D)
• Muffler plate (E)
To clean the cooling system
WARNING: A dirty or blocked cooling
system causes overheating. It causes
damage to the piston and cylinder.
1. Clean the parts of the cooling system with a brush a
minimum of one time a week.
Air filter
• Clean the filter at intervals of 25 hours. Clean more
regularly if necessary.
• Set the choke control in the choke position.
To clean the air filter
Clean the filter at intervals of 25 hours. Clean more
regularly if it is necessary.
CAUTION: Always replace an air filter that is
damaged, very dirty or soaked with fuel.
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