KM 90 R
English
19
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
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 high speed adjusting screw and low
speed adjusting screw on this carburetor
can only be set within narrow limits.
Standard position
N Switch off engine
N Mount KombiTool with attached
working or cutting tool
N Check air filter - clean or replace it if
necessary
N Check throttle cable adjustment,
adjust if necessary – see "Adjusting
the throttle cable"
N Check spark arresting screen -
clean or replace it if necessary
N Carefully turn both adjusting screws
counterclockwise until they are
seated firmly:
– High speed screw (H) is 3/4 of a
turn open
– Low speed screw (L) is 3/4 of a turn
open.
N Start the machine and let the engine
warm up
N Using the idle speed screw (LA), set
the idle speed so that the working
tool does not move
Fine adjustment
A marginal adjustment of the setting of
the high speed screw (H) may be
necessary if the engine does not run
satisfactorily in mountain country, at sea
level or after changing working tools.
Engine Management Adjusting the Carburetor
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