Adjusting The Carburetor - Stihl HS 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
Shut off the engine.
N
Check the air filter and clean or
N
replace if necessary.
Inspect cutting blades and clean if
N
necessary (clean, move freely, not
warped).
Standard Setting
H L
Turn high speed screw (H)
N
counterclockwise as far as stop (no
more than 3/4 turn).
Turn the low speed screw (L)
N
clockwise as far as stop, then turn it
back 3/4 turn.
HS 45
Adjusting Idle Speed
Carry out the standard setting.
N
Start and warm up the engine.
N
L
LA
Adjust idle speed with the idle speed
N
screw (LA) so that the cutting
blades do not run.
Engine stops while idling
Turn the idle speed screw (LA)
N
slowly clockwise until the engine
runs smoothly – the cutting blades
must not run.
Cutting blades run when engine is idling
Turn the idle speed screw (LA)
N
counterclockwise until the cutting
blades stop moving – then turn it
another 1/2 to 1 turn in the same
direction.
WARNING
If the cutting blades continue moving
when the engine is idling, have your
power tool 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 until the engine
runs and accelerates smoothly.
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 engine does not run
satisfactorily:
Carry out the standard setting.
N
Warm up the engine.
N
Turn high speed screw (H) slightly
N
clockwise (leaner) – no further than
stop.
NOTICE
After returning from high altitude, reset
the carburetor to the standard setting.
If the setting is too lean there is a risk of
engine damage due to insufficient
lubrication and overheating.
English
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