Air Filter; Adjusting The Carburetor - Stihl FS 260 Instruction Manual

16 Air filter

15.2 During Operation
After a long period of full throttle operation, allow
the engine to run for a short while at idle speed
so that engine heat can be dissipated by the flow
of cooling air. This protects engine-mounted
components (ignition, carburetor) from thermal
overload.
15.3 After Finishing Work
Storing for a short period: Wait for the engine to
cool down. Empty the fuel tank and keep the
machine in a dry place, well away from sources
of ignition, until you need it again. For longer out-
of-service periods – see "Storing the Machine".
16 Air filter
16.1 General Information
The filter has a very long service life.
Do not remove the filter cover or replace the air
filter as long as there is no noticeable loss of
power.
Dirty air filters reduce engine power, increase
fuel consumption and make starting more diffi‐
cult.
16.2 Replacing the Air Filter
Only if there is a noticeable loss of engine power
► Turn the choke knob to g.
1
► Loosen the screws (1).
3
2
► Remove the filter cover (2).
0458-743-0121-E
► Clean away loose dirt from around the filter (3)
and inside the filter cover.
The air filter (3) is a pleated paper filter element.
► Remove and check the filter element (3) –
replace if paper or frame is dirty or damaged.
► Unpack the new filter.
NOTICE
Do not bend or twist the filter before installation
as it might otherwise be damaged – do not use
damaged filters.
► Fit the filter in the filter housing.
► Fit the filter cover.
Use only high quality air filters to ensure the
engine is protected from abrasive dust.
STIHL recommends you use only original STIHL
air filters. The high quality standard of these
parts guarantees trouble-free operation, a long
engine life and very long filter service lives.
16.3 Filter Element for Winter Oper‐
ation
Maintenance and care of the special filter ele‐
ment for winter operation are described in the
chapter on "Winter Operation".

17 Adjusting the Carburetor

The carburetor has been set at the factory to pro‐
vide an optimum fuel-air mixture under most
operating conditions.
17.1 Adjusting idle speed
Engine stops while idling
► Turn the idle speed screw (LA) slowly clock‐
wise until the engine runs smoothly.
Cutting tool rotates when engine is idling
► Turn the idle speed screw (LA) slowly counter‐
clockwise until the cutting attachment stops
moving.
English
L
H
LA
33