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.
:
:
Start and warm up the engine.
Adjust idle speed with the idle speed
screw (LA) so that the cutting blade
does not rotate.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the high speed screw within fine
limits.
*
see “Guide to Using this Manual”
24
FC 75
| Categories | STIHL Straight Edger Manuals, Straight Edger Manuals |
|---|---|
| Tags | STIHL FC 75 |
| 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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