English / USA
Spark Arresting Screen in
Muffler
At high altitude
: Turn high speed screw (H) clock-
Cutting tool rotates when engine is
idling
The spark arresting screen is an option
that is not fitted in all machines.
wise (leaner) no further than stop
until there is no noticeable increase
in engine speed.
:
Turn idle speed screw (LA) slowly
counterclockwise until the tool stops
rotating and then turn the screw
about another /2 to 3/4 turn in the
same direction.
:
If the engine is low on power, check
the spark arresting screen in the
muffler.
1
:
Wait for muffler to cool down.
At sea level
Turn high speed screw (H) counter-
:
clockwise (richer) no further than
stop until there is no noticeable
increase in engine speed.
Erratic idling behavior, engine stops
even though setting of LA screw is
correct, poor acceleration
1
It is possible that maximum engine
speed may be reached with the
standard setting in each case.
Idle setting too lean:
:
Turn low speed screw (L)
counterclockwise (no further than
stop) until the engine runs and
accelerates smoothly.
Adjusting Idle Speed
:
:
Move slide control to STOP-O.
Remove the screw (1).
It is usually necessary to change the
setting of the idle speed screw (LA)
after every correction to the low speed
screw (L).
Erratic idling behavior
Idle setting too rich:
:
Turn low speed screw (L) clockwise
(no further than stop) until the
engine runs and accelerates
smoothly.
:
Warm up the engine for about
3
minutes.
Engine stops while idling
3
:
Turn idle speed screw (LA) slowly
clockwise until the engine runs
smoothly – the tool must not rotate.
2
2
:
:
Remove the screws (2).
Lift away the shroud (3).
FS 90, FS 90 R
41
| Categories | Blower Vacuum and Sweeper Manuals, STIHL Trimmer Manuals, Trimmer Manuals |
|---|---|
| Tags | STIHL FS 90 |
| Download File |
|
| Language | English, Español |
| Product Brand | STIHL. Stihl Inc, USA - Corporate phone: (757) 486-9100. International Support Information: http://stihl.com Email: info@stihl.com, Trimmer |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
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