English / USA
Adjusting the Carburetor
Standard Setting
Fine Tuning
:
:
:
Shut off the engine.
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.
Mount cutting tool or attachment.
Check the air filter – clean or
replace if necessary.
:
:
:
Check adjustment of the throttle
cable and readjust if necessary –
see "Adjusting the Throttle Cable".
Rule of thumb
:
Turn high speed screw (H) about
a quarter turn for every 1000m
(3300 ft) change in altitude.
Check the spark arresting screen
(not installed in all countries) and
clean or replace if necessary.
:
:
Carry out standard setting.
Carefully screw both adjusting
screws clockwise down onto their
seats.
Warm up engine for about 3
minutes.
:
Open the throttle wide
:
:
Open high speed screw (H)
3/4
turn.
Open low speed screw (L)
3/4
turn.
The carburetor comes from the factory
with a standard setting.
:
:
Start and warm up the engine
Adjust idle speed with the idle speed
screw (LA) so that the tool does not
rotate.
This settingprovides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the engine idle speed within fine
limits.
40
FS 90, FS 90 R
| 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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