► Wash the filter in STIHL special cleaner (spe‐
cial accessory) or a clean, non-flammable sol‐
ution (e.g. warm soapy water). Rinse the filter
from the inside outwards under a jet of water –
do not use a pressure washer.
► Dry the filter components – do not expose to
high temperatures.
NOTICE
–
Allow air filter to dry without using any external
source of heat.
–
Do not impregnate the filter with oil.
► Install the air filter.
23.1.3 Cleaning the air filter (HD2 filter)
► Knock out the filter.
► Spray outside of filter with STIHL special
cleaner or soapy water.
► Rinse outside of filter under warm running
water.
NOTICE
–
Allow air filter to dry without using any external
source of heat.
–
Do not impregnate the filter with oil.
► Allow air filter to dry.
► Install the air filter.
23.1.4 Installing the air filter
► Place the air filter in position.
► Push the air filter in the direction of the filter
housing and turn it clockwise at the same time
until it engages – the "STIHL" name must be
horizontal.
► Install the shroud – see "Shroud".
24 Adjusting the Carburetor
24.1 Basic information
The carburetor comes from the factory with a
standard setting.
The carburetor has been adjusted for optimum
performance and fuel efficiency in all operating
states.
24.2 Preparing the machine
► Switch off the engine
► Check the air filter – clean or replace it if nec‐
essary
24.3 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 1/4 turn
counterclockwise
24.4 Setting the idle speed
► Make standard setting
► Start engine and let it warm up
24.4.1 Engine stops when idling
► Turn the idle speed adjusting screw (LA)
clockwise until the saw chain begins to rotate
– then turn it back 1 turn
24.4.2 Saw chain rotates at idle speed
► Turn the idle speed screw (LA) counterclock‐
wise until the saw chain stops turning – then
turn another full turn in the same direction
24 Adjusting the Carburetor English
0458-574-0121-D 31
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