Stihl FS 130 Product Instruction Manual - Page 42

Fine Tuning, Adjusting Idle Speed

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English / USA 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 or after changing the tool. Rule of thumb : Turn high speed screw (H) about a quarter turn for every 1000m (3300 ft) change in altitude. : Carry out standard setting. : Warm up engine for about 3 minutes. : Open the throttle wide At high altitude : Turn high speed screw (H) clockwise (leaner) no further than stop until there is no noticeable increase in engine speed. At sea level : Turn high speed screw (H) counterclockwise (richer) no further than stop until there is no noticeable increase in engine speed. It is possible that maximum engine speed may be reached with the standard setting in each case. 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 minutes. Engine stops while idling : Turn idle speed screw (LA) slowly clockwise until the engine runs smoothly - the tool must not rotate. Cutting tool rotates when engine is idling : Turn idle speed screw (LA) slowly counterclockwise until the tool stops rotating and then turn the screw about another 1/2 to 3/4 turn in the same direction. Erratic idling behavior, engine stops even though setting of LA screw is correct, poor acceleration Idle setting too lean: : Turn low speed screw (L) counterclockwise (no further than stop) until the engine runs and accelerates smoothly. Erratic idling behavior Idle setting too rich: : Turn low speed screw (L) clockwise (no further than stop) until the engine runs and accelerates smoothly. FS 130, FS 130 R 41

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41
FS 130, FS 130 R
English / USA
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
or after changing the tool.
Rule of thumb
:
Turn high speed screw
(H)
about
a quarter turn for every 1000m
(3300 ft) change in altitude.
:
Carry out standard setting.
:
Warm up engine for about 3
minutes.
:
Open the throttle wide
At high altitude
:
Turn high speed screw
(H)
clock-
wise (leaner) no further than stop
until there is no noticeable increase
in engine speed.
At sea level
:
Turn high speed screw
(H)
counter-
clockwise (richer) no further than
stop until there is no noticeable
increase in engine speed.
It is possible that maximum engine
speed may be reached with the
standard setting in each case.
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 minutes.
Engine stops while idling
:
Turn idle speed screw
(LA)
slowly
clockwise until the engine runs
smoothly – the tool must not rotate.
Cutting tool rotates when engine is
idling
:
Turn idle speed screw
(LA)
slowly
counterclockwise until the tool stops
rotating and then turn the screw
about another
1
/
2
to
3
/
4
turn in the
same direction.
Erratic idling behavior, engine stops
even though setting of LA screw is
correct, poor acceleration
Idle setting too lean:
:
Turn low speed screw
(L)
counterclockwise (no further than
stop) until the engine runs and
accelerates smoothly.
Erratic idling behavior
Idle setting too rich:
:
Turn low speed screw
(L)
clockwise
(no further than stop) until the
engine runs and accelerates
smoothly.