Stihl FR 131 T, Instruction Manual

Page: 30 / 44

FR 131 T
English
28
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".
Filters have an average life of more than
a year. Do not remove the filter cover or
replace the air filter as long as there is no
noticeable loss of power.
If there is a noticeable loss of engine
power
N
Turn the choke knob to
g
.
N
Loosen the screws (1).
N
Remove the filter cover (2).
N
Clean away loose dirt from around
the filter.
N
Remove the filter element (3).
N
Replace dirty or damaged filter
element (3).
N
Replace any damaged parts.
Installing the Filter Element
N
Install the filter element (3) in the
filter housing and fit the cover.
N
Insert the screws (1) and tighten
them down firmly.
The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
Adjusting Idle Speed
Engine stops while idling
N
Warm up the engine for about
3 minutes.
N
Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the attachment
must not run.
Attachment runs when engine is idling
N
Turn the idle speed screw (LA)
slowly counterclockwise until the
cutting attachment stops running
and then turn the screw about
another 1/2 to 3/4 turn in the same
direction.
WARNING
If the attachment continues to run when
the engine is idling, have your machine
checked and repaired by your servicing
dealer.
Operating Instructions Replacing the Air Filter
1
1
0000-GXX-0482-A0
2 3
4
Adjusting the Carburetor
0000-GXX-0495-A0