Adjusting The Carburetor - Stihl TS 440 Instruction Manual

English
13.2 Replacing the air filter
13.2.1 Only if there is a noticeable loss of
engine power
3
2
1
1
1
► Choke lever to c
► Undo the screws (1).
► Remove the filter cover (2) and clean it
► Remove the main filter (3)
► Remove the auxiliary filter (4) – ensuring that
dirt does not enter the intake area
► Clean the filter area
► insert new auxiliary filter and new main filter
► Refit the filter cover
► Tighten down the screws
Only high-quality air filters should be used, to
protect the engine against ingress of abrasive
dust.
STIHL recommends the use of genuine STIHL
air filters. The high quality of these parts will
ensure troublefree operation, a long service life
for the engine and extremely long filter life.

14 Adjusting the Carburetor

14.1 Basic information
The ignition system of this cut-off machine is
equipped with an electronic speed limiter. The
maximum speed cannot be increased beyond a
specified limit.
The carburetor is equipped with a factory-instal‐
led standard setting.
26
4
The carburetor has been adjusted for optimum
performance and fuel efficiency in all operating
states.
14.2 Preparing the machine
► Switch off engine
► Check the air filter – clean or replace it if nec‐
essary
► Check the spark arresting screen in the muf‐
fler – clean or replace it if necessary
14.3 Standard setting
► Turn the high speed adjusting screw (H) coun‐
terclockwise as far as possible – max. 3/4 turn
► Turn the low speed adjusting screw (L) clock‐
wise as far as possible – then turn it 3/4 turn
counterclockwise
14.4 Setting the idle speed
► Carry out the standard setting
► Start engine and let it warm up
14.4.1 Engine stops when idling
► Turn the idle speed adjusting screw (LA)
clockwise until the abrasive cutting wheel
begins to turn – then turn it back 1 turn
14.4.2 Abrasive cutting wheel rotates when
idling
► Turn the idle speed adjusting screw (LA) coun‐
terclockwise until the abrasive cutting wheel
stops rotating – then give the screw another
full turn in the same direction
14 Adjusting the Carburetor
0458-520-8321-B