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Al-ko AL-KO 137 SB Manual

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Starting / Stopping the engine
ENGLISH 13
6.3 Starting
Observe the safety instructions when starting.
Lay the brushcutter level and without obstructions on
the ground.
During starting, never stand or kneel on the shaft
tube, otherwise the shaft or the tube might be
damaged.
Take up a safe position, securely hold the machine
and ensure that the cutter does not touch any objects
or the ground.
When the engine is cold:
With the choke lever up ( ) and with the
decompression valve held down, start the engine
by pulling the starter handle up in a straight line
several times until the motor is briefly audible
(ignition).
Then immediately move the choke lever down (
).
Continue to start (with decompression valve held
down) until the engine runs evenly.
When the engine is warm:
With the choke lever down ( ) and with the
decompression valve activated, start the engine by
pulling the starter handle up in a straight line several
times until the motor runs evenly.
Note: Under good conditions, the engine will already
start under idling throttle if it is at operating
temperature. (If a part throttle stop is set it will be
cancelled by operation of the throttle control even if
the engine is at standstill.)
Starting with the stop switch in mid-position
If the engine will not start under idling throttle, set a
part throttle stop in the way described above.
If the engine is running in part throttle operation:,
briefly pull the throttle back to release the half throttle
detent. Release the throttle lever again to allow the
engine to run at idle speed. Now you can commence
working.
6.4 Turning off the engine:
Release the throttle and push the stop switch to
”STOP”.
Important: Due to the centrifugal clutch, the cutter
will run on for a short time, even if you release the
throttle. Ensure the cutter has come to a full standstill
before storing the machine.
Summary of the key points in the startup process:
• Position the engine safely on level ground,
• If necessary press the primer several times,
• Use the stop switch and the throttle control to
set a part throttle stop.
• Cold start:
o Set the choke lever to
, press the
decompression valve and turn the engine until it
fires for the first time,
o Then set the choke lever to
,
o Keep starting until the engine starts to run.
• Warm start:
o Set the choke lever to
, press the
decompression valve and start the engine
until it starts to run.
• Once the engine is running, briefly pull the throttle
control to cancel the part throttle stop.
6.5 Engine will not start:
If the engine fails to start after several attempts,
check whether all adjustments described above have
been correctly carried out, particularly that the stop
switch is not in the "STOP" position. Try starting once
again. The combustion chamber will be flooded, if the
engine still fails to start.
In that case we recommend you proceed as follows:
• Remove the spark plug cover.
• Pull the spark plug cap off the spark plug.
• Remove the spark plug and dry fuel mixture from
the electrodes.
• Move the throttle lever up to full throttle. Pull the
starter handle several times (with removed spark
plug) to clear the combustion chamber.
• Move the throttle lever down to idling position, refit
the spark plug, the plug cap and the plug cover.
Start the engine with the choke lever down (
) and
the stop switch in the "Start" position.
6.6 Additional notes on correct handling of
the starter
The following instructions are aimed at increasing the
service life of the starter rope and of the starter
mechanism:
• Always pull the rope out in a straight line.
• Do not let the rope drag across the edge of the
rope eyelet.
• Do not pull rope all the way out - risk of the rope
breaking.
• Always manually guide the rope back into its start
position with your hand on the starter grip - do not
let it retract on its own.
A specialist can replace a damaged starter rope.
Fig. 13
… 33 …


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