Checking The Spark Plug - Stihl HS 45 Notice D'emploi

Adjusting Idle Speed
Engine stops while idling
: Low speed screw (L) must be one
turn open.
: Turn idle speed screw (LA) slowly
clockwise until the engine runs
smoothly – cutting blades must not
run.
Cutting blades run when engine
is idling
: Turn idle speed screw (LA) slowly
counterclockwise until cutting
blades stop running and then turn
the screw about another
in the same direction.
Erratic idling behavior, poor
acceleration
(although low speed screw is one turn
open)
Idle setting too lean:
: Turn low speed screw (L)
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).
HS 45
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Fine Tuning for Operation at High
Altitude or at Sea Level
A slight correction of the setting of the
high speed screw (H) may be necessary
if engine power is not satisfactory when
1
/ to 1 turn
2
operating at high altitude or at sea level.
At high altitudes
: Turn the high speed screw (H)
clockwise (leaner) no further than
stop.
At sea level
: Turn the high speed screw (H)
counterclockwise (richer) no further
than stop.
L
H
1
3/4
LA

Checking the Spark Plug

Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition of
the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
English
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