BR 450, BR 450 C
English
19
N Check that the spark plug boot is 
properly connected.
N Repeat the starting procedure.
Fuel tank run until completely dry
N After refueling, press the manual 
fuel pump bulb at least five times – 
even if the bulb is filled with fuel.
N Set the choke knob according to 
engine temperature.
N Now start the engine.
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 components (ignition, 
carburetor) from thermal overload.
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".
Dirty air filters reduce engine power, 
increase fuel consumption and make 
starting more difficult.
If there is a noticeable loss of engine 
power
N Turn the choke knob to c .
N Loosen the screws (1).
N Remove the filter cover (2).
Operating Instructions Replacing the Air Filter