Adjusting The Carburetor - Stihl FS 80 Instruction Manual

2
3
4
: Wash the foam element in a clean,
non-flammable cleaning solution
(e.g. warm soapy water) and then
dry.
: Fit new felt element.
As a temporary measure you can
knock it out on the palm of your
hand or blow it out with compressed
air. Do not wash.
Replace damaged parts!
: Install the foam element (3) in the
filter cover (2).
: Place felt element (4) (lettering
facing inward) in filter housing (5).
: Fit filter cover so that it snaps into
position.
FS 80, FS 80 R, FS 85, FS 85 R

Adjusting the Carburetor

5
The carburetor comes from the factory
with a standard setting.
This setting provides 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.!
Standard Setting
:
:
H L
3 / 4 1
:
:
:
LA
:
:
:
Fine Tuning
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 cutting tool.
Shut off the engine.
Mount FS cutting tool, Power Tool
Attachment or CombiTool.
Check the air filter and replace if
necessary.
Check adjustment of throttle cable –
adjust if necessary – see "Adjusting
the Throttle Cable".
Turn high speed screw (H)
3
counterclockwise (max. /
4
far as stop.
Carefully screw the low speed
screw (L) down onto its seat. Then
open it one turn counterclockwise.
Start and warm up the engine.
Adjust idle speed with the idle speed
screw (LA) so that the cutting tool
does not rotate.
English
turn) as
35