Stihl FS 40 Notice D'emploi page 21

Operating Instructions
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 perionds – see "Storing the
Machine".
FS 40, FS 40 C, FS 50, FS 50 C
All manuals and user guides at all-guides.com
Cleaning the Air Filter
If there is a noticeable loss of engine
power
1
N Move the choke lever (1) to <.
N Turn the screw (2) in the filter
cover (3) counterclockwise until the
cover is loose.
N Ease the filter cover (3) over the
choke lever and lift it away.
N Clean away loose dirt from around
the filter.
3
N
2
N
N
N
N
4
Reach into the recess (4) in the filter
housing and take out the felt
filter (5).
Fit a new felt filter element (5). 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.
Fit the felt filter (5) in the filter
housing, make sure it is properly
seated – the arrow points to the
recess.
Move the choke lever (1) to <.
Fit the filter cover in position,
making sure the screw is square.
Tighten down the screw.
English
19