Stihl HT 100 Manual De Instrucciones página 34

English
Version B
H L
LA
High speed screw and low speed
–
screw with slotted head.
With this carburetor it is only possible to
adjust the high speed and low speed
screws within fine limits.
Standard Setting
Shut off the engine
N
Mount approved cutting tool or
N
attachment.
Check the air filter and clean or
N
replace as necessary.
Check that the throttle cable is
N
properly adjusted – readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
Check the spark arresting screen
N
(not in all versions) and clean or
replace as necessary.
32
H L
LA
Carefully turn both adjusting screws
N
counterclockwise as far as stop:
The high speed screw (H) is 3/4 turn
–
open.
The low speed screw (L) is 3/4 turn
–
open.
Start and warm up the engine.
N
Adjust idle speed with the idle speed
N
screw (LA) so that the chain does
not run.
Adjusting Idle Speed
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed screw
(L).
Warm up the engine for about 3
N
minutes.
Engine stops while idling
Turn the idle speed screw (LA)
N
slowly clockwise until the engine
runs smoothly – the chain must not
rotate.
Chain rotates when engine is idling
Turn the idle speed screw (LA)
N
counterclockwise until the chain
stops running and then turn the
screw about another 1/2 to 3/4 turn
in the same direction.
WARNING
If the chain continues moving when the
engine is idling, have your saw machine
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
Idle setting is too rich
Turn the low speed screw (L)
N
clockwise, no further than stop, until
the engine runs and accelerates
smoothly.
Version B: Fine Tuning
A slight correction of the setting of the
high speed screw (H) may be necessary
if engine power is not satisfactory when
operating at high altitude or at sea level.
Rule of thumb:
Turn the high speed screw (H) about
one quarter turn for every 1000m (3300
ft) change in altitude.
Conditions for adjustment
Carry out the standard setting
N
without disturbing the high speed
screw (H).
Warm up the engine for about 3
N
minutes.
Open the throttle wide.
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HT 100, HT 101, HT 130, HT 131