Husqvarna 439 Manuel D'utilisation page 24

2. Make sure that the muffler is correctly attached to
the product.
3. Loosen the screws (1 and 2).
1
4. Remove the muffler cover.
24
5. Loosen the screws and nuts. Remove the muffler
and make sure that the muffler has no damage.
Carburetor with adjustment limitations
2
Note: If you do not know which carburetor type that you
have on your product, speak to your servicing dealer.
Carburetor adjustment
Because of environmental and emissions laws, your
product has adjustment limitations on the carburetor
adjuster screws. This decreases the harmful exhaust
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 34 .
CAUTION: If the spark arrestor mesh is
blocked the product becomes too hot and
this causes damage to the cylinder and
piston.
CAUTION: The spark arrestor mesh must be
replaced if it is damaged. Do not use a
product if the spark arrestor mesh on the
muffler is missing or defective.
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