Cleaning The Air Filter; Adjusting The Carburetor - Stihl FS 55 Instruction Manual

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Cleaning the Air Filter

If there is a noticeable loss of engine
power
2
1
Set the choke lever to g.
N
Press in the tab (1) and swing the
N
filter cover (2) down.
Clean away loose dirt from around
N
the filter.
26
4
3
Remove the felt element (3) from
N
the filter housing (4) and replace it –
knock out or blow out as a
temporary measure – do not wash.
Replace damaged parts.
N
Fit the felt element (3) in the filter
N
housing (4).
Close the filter cover so that it snaps
N
into position.

Adjusting the Carburetor

General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
Preparations
Shut off the engine.
N
Mounting the Cutting Attachment
N
Check the air filter and clean or
N
replace if necessary.
Check the spark arresting screen
N
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
FS 55 – Different Standard Settings
Different carburetors are installed at the
factory. A different standard setting is
necessary for each of these carburetors.
Standard setting A
High speed screw (H) = 3/4
–
Low speed screw (L) = 1 1/2
–
Standard setting B
High speed screw (H) = 3/4
–
Low speed screw (L) = 3/4
–
FS 55, FS 55 C, FS 55 R, FS 55 RC