Engine Management; Adjusting The Carburetor - Stihl HS 45 Notice D'emploi

Engine Management

Exhaust emissions are controlled by the
design of the engine and components
(e.g. carburation, ignition, timing and
valve or port timing).
HS 45

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.
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
English
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