Stihl FS 350, Instruction Manual, Page: 77 / 96

FS 300, FS 350, FS 380
English
75
During break-in period
A factory-new machine should not be
run at high revs (full throttle off load) for
the first three tank fillings. This avoids
unnecessary high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
engine are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
During Operation
After a long period of full throttle
operation, allow the engine to run for a
short while at idle speed so that engine
heat can be dissipated by the flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the
engine to cool down. Empty the fuel tank
and keep the machine in a dry place,
well away from sources of ignition, until
you need it again. For longer out-of-
service periods – see "Storing the
Machine".
If there is a noticeable loss of engine
power
N
Turn the choke knob to
g
.
N
Press in the tab (1) and remove the
filter cover (2).
N
Clean away loose dirt from around
the filter (3) and inside the filter
cover.
N
Remove and check the filter
element – replace it if is dirty or
damaged.
N
Install the filter element in the filter
cover.
N
Refit the filter cover.
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
N
Shut off the engine.
N
Mount the cutting attachment.
N
Check the air filter and clean or
replace if necessary.
N
Check that the throttle cable is
properly adjusted – readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
Standard Setting
–
High speed screw (H) = 1 1/2
–
Low speed screw (L) = 1
Operating Instructions Air filter
250BA071 KN
Adjusting the Carburetor