Husqvarna T435 Operator's Manual page 20

3. Loosen the screws and nuts.
4. Remove the muffler and make sure that it is not
defective.
5. Assemble the muffler and make sure that it is
correctly attached to the product.
6. Some mufflers have a special spark arrestor mesh.
Clean the spark arrestor mesh one time each week if
your product has this type of muffler.
Carburetor adjustment
Because of environmental and emissions laws, your
product has adjustment limitations on the carburetor
adjuster screws. This decreases the harmful exhaust
20
fumes from your product. You can only turn the
adjustment screws maximum ½ turn.
Basic adjustments and run-in
The basic carburetor adjustments are done at the
factory. For the recommended idle speed, refer to
Technical data on page 29 .
CAUTION: Do not operate the product at too
high speed during the first 10 hours of
operation.
CAUTION: If the saw chain rotates at idle
speed, turn the idle speed screw
counterclockwise until the saw chain stops.
To adjust the low speed needle (L)
• Turn the low speed needle clockwise until stop.
Note: If the product has a bad acceleration capacity
or if the idle speed is not correct, turn the low speed
needle counterclockwise. Turn the low speed needle
until the acceleration capacity and idle speed is
correct.
To adjust the idle speed screw (T)
1. Start the product.
2. Turn the idle speed screw clockwise until the saw
chain starts to rotate.
3. Turn the idle speed screw counterclockwise until the
saw chain stops.
Note: The idle speed is correctly adjusted when the
engine runs correctly in all positions. The idle speed
must also be safely below the speed at which the saw
chain starts to rotate.
WARNING: If the saw chain does not stop
when you turn the idle speed screw, speak
to your servicing dealer. Do not use the
product until it is correctly adjusted.
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