Operation Manual
GS 461
English
21
If there is a noticeable loss of engine
power:
N Dry wet air filter if necessary – do
not expose to extreme heat
N If the air filter is very dirty, clean the
filter thoroughly
Thorough filter cleaning
N Wash the air filter in STIHL special-
purpose cleaner (special
accessory) or a clean, non-
flammable cleaning liquid (e. g.,
warm soapy water) – rinse the air
filter from inside to out under a water
flow – do not use high-pressure
washers
N Dry the air filter – do not expose to
extreme heat, do not dry with
compressed air
N Do not oil the air filter
N Reinstall air filter
Always replace a damaged air filter.
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.
The adjusting screws on this carburetor
can only be set within narrow limits.
The ignition module limits the maximum
speed. It is therefore not possible to
increase the maximum speed by further
turning the high speed screw (H) in the
clockwise direction (making the mix
leaner).
NOTICE
If you make the setting too lean it will
increase the risk of engine damage
through lack of lubrication and
overheating.
Standard setting
N Switch off the engine
N Check the air filter – clean or replace
it if necessary
N Check the spark arresting screen in
the muffler (present only in some
countries) – clean or replace it if
necessary
N Turn the high speed screw (H)
counterclockwise as far as possible
(max. 3/4 turn)
N Turn the low speed screw (L)
clockwise – as far as possible – then
back off 1/4 turn
Setting the idle speed
Before starting, open the shut-off valve
completely and ensure a supply of water
to the diamond abrasive chain – do not
allow diamond abrasive chain to run dry.
Engine stops when idling or diamond
abrasive chain rotates at idle speed
N Check standard setting
N Turn the idle speed adjusting
screw (LA) clockwise until the
diamond abrasive chain begins to
run – then turn it back 1 1/2 turns.
Cleaning the Air Filter Adjusting the Carburetor
3443BA001 KN
3443BA002 KN