20
English / USA
BT 120 C
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
.
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".
:
Turn the high speed screw (
H
)
counterclockwise as far as stop
–
max.
3
/
4
turn
:
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.
Carburetor with H, L and LA
Screws
LA
H
L
1
250BA039 KN