Operating Instructions; Replacing The Air Filter; Adjusting The Carburetor; Spark Plug - Stihl KM 111 R Instruction Manual

11 Operating Instructions

Fuel tank run until completely dry
► After refueling, press the manual fuel pump
bulb at least five times – even if the bulb is
already filled with fuel.
► Set the choke lever to suit the engine temper‐
ature.
► Now start the engine.
11 Operating Instructions
11.1 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 dur‐
ing 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.
11.2 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.
11.3 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".

12 Replacing the Air Filter

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.
12.1 If there is a noticeable loss of
engine power
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0458-436-0121-B
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2
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► Turn the choke knob to g.
► Loosen the screws (1).
► Remove the filter cover (2).
► Clean away loose dirt from around the filter.
► Remove the filter element (3).
► Replace dirty or damaged filter element (3).
► Replace any damaged parts.
12.2 Installing the Filter Element
► Install the filter element (3) in the filter housing
and fit the cover.
► Insert the screws (1) and tighten them down
firmly.

13 Adjusting the Carburetor

The carburetor has been set at the factory to pro‐
vide an optimum fuel-air mixture under most
operating conditions.
13.1 Adjusting Idle Speed
Engine stops while idling
► Warm up the engine for about 3 minutes.
► Turn the idle speed screw (LA) slowly clock‐
wise until the engine runs smoothly – the
attachment must not run.
Attachment runs when engine is idling
► Turn the idle speed screw (LA) slowly counter‐
clockwise 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.

14 Spark Plug

1
► If the engine is down on power, difficult to start
or runs poorly at idle speed, first check the
spark plug.
English
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