Husqvarna 450 Rancher Manual De Usuario página 25

3. If your product has a special spark arrester mesh,
clean the spark arrester mesh weekly.
4. Replace a damaged spark arrester mesh.
CAUTION:
is blocked the product becomes too hot
and this causes damage to the cylinder and
piston.
To adjust the idle speed screw (T)
The basic carburetor adjustments are done at the
factory. You can adjust the idle speed but for more
adjustments, refer to your servicing dealer.
To give the components of the engine sufficient
lubrication during run-in, adjust the idle speed. Adjust
the idle speed to the recommended idle speed. Refer to
Technical data on page 33 .
CAUTION:
at idle speed, turn the idle speed screw
counterclockwise until the saw chain stops.
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:
stop when you turn the idle speed screw,
speak to your servicing dealer. Do not use
the product until it is correctly adjusted.
1286 - 012 - 08.03.2023
If the spark arrester mesh
If the saw chain rotates
If the saw chain does not
To examine if the carburetor is correctly
adjusted
• Make sure that the product has the correct
acceleration capacity.
• Make sure that the product 4-cycles a little at full
throttle.
• Make sure that the saw chain does not rotate at idle
speed.
• If the product is not easy to start or has less
acceleration capacity, adjust the low and high speed
needles.
CAUTION:
can cause damage to the engine.
To replace a broken or worn starter
rope
1. Loosen the screws to the starter housing
2. Remove the starter housing.
3. Pull out the starter rope approximately 30 cm/12 in
and put it in the notch on the pulley.
4. Let the pulley rotate slowly rearward to release the
recoil spring.
5. Remove the center screw, the drive disc (A), the
drive disc spring (B) and the pulley (C).
WARNING:
when you replace the return spring or
the starter rope. The recoil spring is in
tension when it is wound up in the starter
housing. If you are not careful, it can
eject and cause injuries. Use protective
glasses and protective gloves.
Incorrect adjustments
You must be careful
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