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Alpina TB 420 Manual

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9
EN
• Hot starting
When hot starting (immediately after stopping the
engine), follow the procedure indicated above in
points 1 - 5 - 6 - 7.
USE OF THE ENGINE (Fig. 8)
Cutting device speed is regulated by the throttle
trigger (2), located on the rear handgrip (4) or the
right handgrip (4a) of the handlebar.
The throttle trigger only works if the lockout (3) is
pressed at the same time.
The movement is transmitted from the engine to
the drive shaft by a centrifugal mass clutch that
prevents the shaft from moving when the engine
is running at minimum speed.
WARNING!
Do not use the machine if
the cutting device moves when the engine is
running idle; in this case, contact you dealer.
The correct running speed will be achieved by
pressing the throttle trigger (2) as far as possible.
IMPORTANT
Avoid using the engine at
full power for the rst 6-8 working hours.
STOPPING THE ENGINE (Fig. 8)
To stop the engine:
– Release the throttle trigger (2) and allow the
engine to run idle for a few seconds.
– Set the switch (1) to «STOP».
WARNING!
When you have reduced
speed to a minimum, it will take a few sec-
onds for the cutting device to stop
3. Press the primer device button (6) 3 or 4 ti mes
to prime the carburettor.
4. Press the safety lever (3), activate the throttle
trigger (2) and hold it in this position using the
shutter button (7 - if provided); then release
the safety lever (3).
5. Hold the machine rmly on the ground with
one hand on the power unit, in order not to
lose control of the machine during startup (Fig.
9).
IMPORTANT
To prevent distortions,
the drive tube must not be used as a support
for the hand or knee during startup.
6. Pull the starter rope slowly for 10 - 15 cm until
you feel some resistance, then tug it hard a
few times until you hear the engine turn over.
IMPORTANT
To avoid breaking the
sta r ter rope, do not pull the whole length of
it or let it slide along the edge of the cable
guide hole. Release the starter gradually, to
avoid letting it y back uncontrollably.
7. Pull the starter rope again until the engine
starts as normal.
WARNING!
Starting the engine with
the starter and/or shutter (if present) en ga-
ged causes the cutting device to move, on ly
stopping when the starter is disconnected.
8. When the engine is started, disconnect the
starter by turning the lever (2) to «ON».
9. Disconnect the shutter (7 - if provided) briey
activating the throttle trigger (2), to take the
engine back to minimum speed.
10. Let the engine run idle for at least 1 minute
before using the machine.
IMPORTANT
If the starter rope is
pulled repeatedly with the choke on, it may
ood the engine and make starting dicult.
If you have ooded the engine, remove the spark
plug and gently pull the handle on the starter rope
to eliminate any excess fuel; then dry the spark
plug electrodes and replace it on the en gine.
HOW TO START - USE - STOP THE ENGINE
… 15 …


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