Instruction Manual

MS 271, MS 271 C, MS 291, MS 291 C
English
44
Installing the air filter
N Place the air filter in position.
N 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.
N Install the shroud – see "Shroud".
Exhaust emissions are controlled by the
design of the engine and components
(e.g. carburation, ignition, timing and
valve or port timing).
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.
Preparing the machine
N Switch off the engine
N Check the air filter – clean or replace
it if necessary
Standard setting
N Turn the high speed adjusting
screw (H) counterclockwise as far
as possible (max. 3/4 turn)
N Turn the low speed adjusting
screw (L) clockwise as far as
possible – then turn it 1/4 turn
counterclockwise
2710BA001 KN
2.
1.
Engine Management Adjusting the Carburetor
L
5902BA035 KN
H