Adjusting The Carburetor - Stihl HL 45 Manual De Instrucciones

Adjusting the Carburetor

General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
Preparations
Stopping the Engine
N
Inspect cutting blades and clean if
N
necessary (clean, move freely, not
warped).
Check the air filter and clean or
N
replace if necessary.
Check the spark arresting screen
N
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
HL 45
Standard Setting
H L
LA
Turn high speed screw (H)
N
counterclockwise as far as stop (no
more than 3/4 turn).
Turn the low speed screw (L)
N
carefully clockwise as far as stop,
then turn it back 3/4 turn.
Adjust idle speed
Carry out the standard setting.
N
Start and warm up the engine.
N
Engine stops while idling
Turn the idle speed screw (LA)
N
slowly clockwise until the engine
runs smoothly – the cutting blades
must not move.
Cutting blades run when engine is idling
Turn the idle speed screw (LA)
N
counterclockwise until the cutting
blades stop moving and then turn
the screw about another 1/2 to 1 full
turn in the same direction.
WARNING
If the cutting attachment continues to run
when the engine is idling, have your
machine checked and repaired by your
servicing dealer.
Erratic idling behavior, poor acceleration
(despite correction to setting of LA
screw).
Idle setting is too lean
Turn the low speed screw (L) slowly
N
counterclockwise (1/4 turn), no
further than stop, until the engine
runs and accelerates smoothly.
Erratic idling behavior
Idle setting is too rich
Turn the low speed screw (L) slowly
N
clockwise (1/4 turn), no further than
stop, until the engine runs smoothly
and still accelerates satisfactorily.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
Fine Tuning for Operation at High
Altitude
A slight correction of the setting may be
necessary if the engine does not run
satisfactorily:
English
19