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 authorized 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 Tscrew
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.
Engine adjustment
The following steps should be taken when the chain saw
is started for the first time or when outside circumstances
change (fuel, altitude, air filter etc.): Start the engine.
Accelerate the engine to full throttle and saw a number of
cuts in a thick log (3-5 min.).
The chain saw must be run (8,000 - 12,000 rpm) the entire
time so that the carburettor can adjust itself.
Conditions
NOTE! There is an integrated speed governor in the
ignition system that limits the maximum speed. When the
speed governor is activated, you will get the same sound
experience as when the chain saw 4-cycles.
