Stihl BT 120 C Manual De Instrucciones página 21

English / USA
Engine stops while idling
:
Turn the idle speed screw (LD)
slowly clockwise until the engine
runs smoothly – the drilling spindle
must not rotate.
Drilling spindle rotates when engine
is idling
:
Turn the idle speed screw (LD)
counterclockwise until the drilling
spindle stops rotating – then turn the
screw about another one full turn in
the same direction from that
position.
Erratic idling behavior, poor
acceleration
:
Turn the idle speed screw (LD)
slowly counterclockwise no more
than one half turn.
20
Carburetor with H, L and LA
Screws
General Information
Your carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the high speed screw within fine
limits.
Standard Setting
: Shut down the engine.
:
Remove the auger from the
machine.
:
Check air filter and clean or replace
as necessary.
:
Check that the throttle cable is
properly adjusted and readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
L
H
1
LA
: Turn the high speed screw (H)
counterclockwise as far as stop
3
– max. / turn
4
:
Carefully turn the low speed
screw (L) down onto its seat
clockwise. Then open it one turn
counterclockwise.
:
Start and warm up the engine.
:
Adjust idle speed with the idle speed
screw (LA) so that the drilling
spindle does not rotate.
BT 120 C