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MAINTENANCE
30 – English
General
The user must only carry out the maintenance and service
work described in this manual. More extensive work must be
carried out by an authorised service workshop.
Carburetor adjustment
Your Husqvarna product has been designed and
manufactured to specifications that reduce harmful
emissions.
AutoTune
If the engine is equipped with AutoTune, manual adjustment
of the carburettor’s H and L needles and the T-screw no
longer applies. Both needles and the T-screw have been
removed. AutoTune is a function that adjusts the carburettor
electronically, always resulting in optimal adjustment.
Function
• The carburetor governs the engine’s speed via the
throttle control. Air and fuel are mixed in the carburetor.
The air/fuel mixture is adjustable.
• The automatic adjustment of the carburettor means that
the engine is adapted to local conditions, e.g. the climate,
altitude, petrol and the type of 2-stroke oil. This function
is controlled by AutoTune.
Conditions
CAUTION! There is an integrated speed governor in the
ignition system that limits the maximum speed to 13600 rpm.
When the speed governor is activated, you will get the same
sound experience as when the chain saw 4-cycles.
Correctly adjusted carburetor
A correctly adjusted carburettor means the machine
accelerates without hesitation and it four-strokes a little at full
throttle. In addition, the chain should not rotate when idling.
Checking, maintaining and
servicing chain saw safety
equipment
Chain brake and front hand guard
Checking brake band wear
Brush off any wood dust, resin and dirt from the chain brake
and clutch drum. Dirt and wear can impair operation of the
brake.
Regularly check that the brake band is at least 0.024 inch
(0.6 mm) thick at its thinnest point.
Checking the front hand guard
Make sure the front hand guard is not damaged and that
there are no visible defects such as cracks.
Move the front hand guard forwards and back to make sure
it moves freely and that it is securely anchored to the clutch
cover.
Note! All servicing and repair work on the machine requires
special training. This is especially true of the machine
′s
safety equipment. If your machine fails any of the checks
described below we recommend you to contact our
servicing dealer.