English / USA
Rule of thumb
At high altitudes
Cutting tool rotates when engine is
idling
:
Turn the high speed screw (H)
clockwise (leaner) no further than
stop until there is no noticeable
increase in engine speed.
Rotate the high speed screw (H) about
/4 turn for every 1000 meter (3300 ft)
change in altitude.
:
Turn idle speed screw (LA) slowly
counterclockwise until cutting tool
stops rotating and then turn the
1
Conditions for adjustment
1
screw about another /2 to 1 turn in
At sea level
the same direction.
Carry out adjustment with nylon line
cutting head, making sure the
cutting lines are at full length (as far
as limiter blade on deflector).
:
Turn the high speed screw (H)
counterclockwise (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
Use standard setting for metal
cutting tools.
It is possible that maximum engine
speed will already be reached with
the standard setting in each case.
Idle setting too lean:
:
:
Carry out standard setting without
altering position of the high speed
screw (H).
:
Turn low speed screw (L)
counterclockwise (about 1/4 turn)
until the engine runs and
accelerates smoothly.
Adjusting Idle Speed
Warm up engine for about
5
fitted or about 3 minutes if a nylon
line cutting head is fitted.
minutes if a metal cutting tool is
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:
:
Open the throttle wide.
:
Turn low speed screw (L) clockwise
(about /4 turn) until the engine runs
1
:
Warm up engine.
and accelerates smoothly.
Engine stops while idling
:
Turn idle speed screw (LA) slowly
clockwise until the engine runs
smoothly – cutting tool must not
rotate.
FS 55
37
| Categories | Blower Vacuum and Sweeper Manuals, STIHL Trimmer Manuals, Trimmer Manuals |
|---|---|
| Tags | STIHL FS 55 |
| 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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