Operating Instructions; Replacing The Air Filter - Stihl BR 450 Instruction Manual

English
9.3 Stopping the Engine
► Move the setting lever to 0 – the engine stops
– the setting lever springs back to the on posi‐
tion.
9.4 Other Hints on Starting
Electric starter does not operate
► Temperature below 0°C, electric starter is
deactivated - start engine manually.
► Low electric starter battery - start engine man‐
ually.
Engine stalls in cold start position c or under
acceleration
► Move the choke knob to o and continue
cranking until the engine runs.
Engine does not start in warm start position o
► Move the choke knob to c and continue
cranking until the engine runs.
If the engine does not start
► Check that all settings are correct.
► Check that there is fuel in the tank and refuel if
necessary.
► Check that the spark plug boot is properly con‐
nected.
► Repeat the starting procedure.
Fuel tank run until completely dry
► After refueling, press the manual fuel pump
bulb at least five times – even if the bulb is fil‐
led with fuel.
► Set the choke knob according to engine tem‐
perature.
► Now start the engine.

10 Operating Instructions

10.1 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 helps protect engine-mounted
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components (ignition, carburetor) from thermal
overload.
10.2 After Finishing Work
Storing for a short period: Wait for the engine to
cool down. 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".

11 Replacing the Air Filter

Dirty air filters reduce engine power, increase
fuel consumption and make starting more diffi‐
cult.
11.1 If there is a noticeable loss of
engine power
► Turn the choke knob to c .
► Loosen the screws (1).
► Remove the filter cover (2).
10 Operating Instructions
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0458-391-8321-B