Instruction Manual

MS 151 TC
English
37
If there is a noticeable loss of engine
power
N Turn the twist lock 90°
counterclockwise.
N Remove the shroud upwards.
N Remove the air filter upwards.
N Wash the filter in STIHL special
cleaner (special accessory) or a
clean, non-flammable solution (e.g.
warm soapy water) and then dry.
NOTICE
Do not use a brush to clean the filter.
Always replace a damaged filter.
Exhaust emissions are controlled by the
design of the engine and components
(e.g. carburation, ignition, timing and
valve or port timing).
General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
Preparations
N Shut off the engine.
N Check the air filter and clean or
replace if necessary.
N Check the spark arresting screen
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
Standard Setting
N Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
N Turn the low speed screw (L)
clockwise as far as stop, then turn it
back 1/4 turn.
Cleaning the Air Filter
3006BA009 KN
3009BA010 KN
Engine Management Adjusting the Carburetor
L
H
3006BA011 KN