Adjusting The Carburetor - Stihl KM 56 R Manual De Instrucciones

English

Adjusting the Carburetor

The 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
make corrections with the adjusting
screws within fine limits.
Standard Setting
Shut off the engine.
N
Mount a KombiTool – we
N
recommend the brushcutter with
mowing head
Check the air filter and replace the
N
element if necessary.
Have the spark arresting screen
N
(not all markets) checked – see
"Inspection and Maintenance by
Dealer"
Turn the high speed screw (H)
N
counterclockwise as far as stop
(max. 3/4 turn possible).
Turn the low speed screw (L)
N
counterclockwise as far as stop
(max. 3/4 turn possible).
20
Start and warm up the engine if
N
necessary.
Adjust idle speed with the idle speed
N
screw (LA) so that the working tool
does not move.
Fine Tuning for Operation in Mountains
or at Sea Level
A slight correction of the setting may be
necessary if engine power is not
satisfactory when operating at high
altitude or at sea level.
Warm up the engine.
N
At high altitude
Turn high speed screw (H)
N
clockwise (leaner) – no further than
stop.
At sea level
Turn high speed screw (H) slightly
N
counterclockwise (richer) – no
further than stop.
Adjusting Idle Speed
Warm up the engine.
N
Engine stops while idling
Turn the idle speed screw (LA)
N
slowly clockwise until the engine
runs smoothly – the working tool
must not move.
Working tool runs when engine is idling
Turn the idle speed screw (LA)
N
counterclockwise until the working
tool stops moving and then turn the
screw another full turn in the same
direction.
If the working tool continues to run when
the engine is idling, have your machine
checked and repaired by your servicing
dealer.
Erratic idling behavior, engine stops
even though setting of LA screw has
been corrected, poor acceleration
Idle setting is too lean
Turn the low speed screw (L)
N
counterclockwise, no further than
stop, until the engine runs and
accelerates smoothly.
Erratic idling behavior, engine speed
drops when swinging the machine
Idle setting is too rich
Turn the low speed screw (L)
N
clockwise (1/8 of a turn or 45° at a
time) until the engine runs smoothly
and accelerates well.
It is usually necessary to change the
setting of the idle speed screw (LA) after
corrections to the low speed screw (L).
KM 56 R, KM 56 RC