Adjusting The Carburetor - Stihl TS 410 Instruction Manual

Adjusting the Carburetor

Basic information
The ignition system of this cut-off
machine is equipped with an electronic
maximum speed limiter. The maximum
speed cannot be increased beyond a
specified limit.
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
Switch off the engine
N
Check the air filter – clean or replace
N
it if necessary
Check the spark arresting screen in
N
the muffler (present only in some
countries) – clean or replace it if
necessary
TS 410, TS 420
Standard setting
Turn the high speed adjusting
N
screw (H) counterclockwise as far
as possible (max. 3/4 turn)
Turn the low speed adjusting
N
screw (L) clockwise as far as
possible – then turn it 3/4 turn
counterclockwise
Setting the idle speed
Make standard setting
N
Start engine and let it warm up
N
Engine stops when idling
Turn the idle speed adjusting
N
screw (LA) clockwise until the
abrasive wheel begins to rotate –
then turn it back 1 turn
Abrasive wheel runs when idling
Turn the idle speed screw (LA)
N
counterclockwise until the abrasive
wheel stops running – then turn
another full turn in the same
direction
WARNING
If the abrasive wheel continues to keep
rotating in idle even after adjustment,
have the cut-off machine checked by a
servicing dealer.
Speed erratic when idling; poor
acceleration (despite adjustment to LA
setting)
The idle setting is too lean.
Turn the low speed adjusting
N
screw (L) approx. 1/4 turn
counterclockwise until the engine
runs and accelerates smoothly –
max. up to the stop
Idle speed cannot be increased
sufficiently via the idle speed adjusting
screw (LA), engine stops when
changing from part-load to idle speed
The idle setting is too rich.
Turn low speed adjusting screw (L)
N
approx. 1/4 turn clockwise.
Whenever the low speed adjusting
screw (L) has been adjusted, it is usually
also necessary to readjust the idle
speed adjusting screw (LA).
English
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