English / USA
Adjusting the Carburetor
Standard Setting
Fine Tuning for Operation
at High Altitudes
A slight correction of the setting of the
high speed screw (H) may be necessary
if engine power is not satisfactory.
:
:
Shut off the engine.
Mount the cutting blade and clean it
if necessary (make sure it is not
damaged or warped).
H
/ 4
L
1
3
Rule of thumb
:
Check adjustment of the throttle
cable* and readjust if necessary –
see "Adjusting the Throttle Cable".
:
Turn high speed screw (H) about
a quarter turn for every 3300 ft
:
:
:
Check spark arresting screen* and
(1000m)
change in altitude.
clean or replace if necessary
:
:
Carry out standard setting.
Check the air filter and replace if
necessary.
Turn high speed screw (H)
counterclockwise (max. 3/4 turn)
as far as stop.
Warm up the engine for about 5
LA
minutes.
:
:
Open the throttle wide.
Turn high speed screw (H) clock-
wise (leaner) 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.
:
Carefully screw the low speed
screw (L) down onto its seat. Then
open it one turn counterclockwise.
The carburetor comes from the factory
with a standard setting.
This settingprovides an optimum fuel-air
mixture under most operating
conditions.
:
:
Start and warm up the engine.
Adjust idle speed with the idle speed
screw (LA) so that the cutting blade
does not rotate.
With this carburetor it is only possible to
adjust the high speed screw within fine
limits.
*
see “Guide to Using this Manual”
FC 85
23
| Categories | STIHL Straight Edger Manuals, Straight Edger Manuals |
|---|---|
| Tags | STIHL FC 85 |
| 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, Edger |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
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