Stihl SR 420 Instruction Manual - Page 22

Allow engine to warm up

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2 1 373BA014 KN English / USA : Fit the spark plug and reconnect the spark plug boot. : Move the stop switch to # : Turn the choke knob to e even if the engine is cold. : Now start the engine. Fuel tank run until dry and then refueled : Pull the starter rope several times to prime the fuel line. 373BA016 KN 373BA015 KN As soon as engine runs: : Move the setting lever (2) to the lower stop so that the engine settles down to idle speed. To shut down the engine: : Move the stop switch (1) to 0 or STOP. At very low outside temperatures: Allow engine to warm up As soon as engine runs: : Move the setting lever to the lower stop - the engine settles down to idle speed. : Open throttle slightly - warm up engine for a short period. If the engine does not start: If you did not turn the choke knob to e quickly enough after the engine began to fire, the combustion chamber is flooded. : Pull off the spark plug boot. : Unscrew and dry off the spark plug. : Move the stop switch to 0 or STOP. : Open the throttle wide. : Pull the starter rope several times to clear the combustion chamber. SR 340, SR 420 21

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21
SR 340, SR 420
English / USA
As soon as engine runs:
:
Move the setting lever (
2
) to the
lower stop so that the engine settles
down to idle speed.
To shut down the engine:
:
Move the stop switch (
1
) to
0
or
STOP
.
At very low outside temperatures:
Allow engine to warm up
As soon as engine runs:
:
Move the setting lever to the lower
stop – the engine settles down to
idle speed.
:
Open throttle slightly – warm up
engine for a short period.
If the engine does not start:
If you did not turn the choke knob to
e
quickly enough after the engine began to
fire, the combustion chamber is flooded.
:
Pull off the spark plug boot.
:
Unscrew and dry off the spark plug.
:
Move the stop switch to
0
or
STOP
.
:
Open the throttle wide.
:
Pull the starter rope several times to
clear the combustion chamber.
:
Fit the spark plug and reconnect the
spark plug boot.
:
Move the stop switch to
#
:
Turn the choke knob to
e
even if the engine is cold.
:
Now start the engine.
Fuel tank run until dry and then
refueled
:
Pull the starter rope several times to
prime the fuel line.
373BA014 KN
2
1
373BA015 KN
373BA016 KN