Husqvarna K970 IIl Chain Operator's Manual page 23

Carburettor
The carburettor is equipped with fixed needles to ensure
the machine always receives the correct mixture of fuel
and air. When the engine lacks power or accelerates
poorly, do the following:
• Check the air filter and replace if necessary. When this
does not help, contact an authorised service
workshop.
Adjusting the idle speed
CAUTION! Contact your dealer/service
!
workshop, if the idle setting cannot be
adjusted so that the diamond chain is
stationary. Do not use the machine until
it has been properly adjusted or repaired.
Start the engine and check the idling setting. When the
carburettor is set correctly the diamond chain should be
still while engine is idling.
• Adjust the idle speed using the T screw. Turn the idle
speed screw clockwise until the chain starts to rotate.
Now turn the screw anti-clockwise until the chain
stops rotating.
Rec. idle speed: 2700 rpm
Starter housing
WARNING! When the recoil spring is
!
wound up in the starter housing it is under
tension and can, if handled carelessly, pop
out and cause personal injury.
Always be careful when changing the
recoil spring or the starter cord. Always
wear protective goggles.
Changing a broken or worn starter cord
• Loosen the screws that hold the starter against the
crankcase and remove the starter.
MAINTENANCE
T
• Pull the cord out about 30 cm and lift it into the cut-out
in the periphery of the starter pulley. When the cord is
intact: Release the spring tension by letting the pulley
rotate slowly backwards.
• Remove any remnants of the old starter cord and
check that the return spring works. Insert the new
starter cord through the hole in the starter housing
and in the cord pulley.
• Secure the starter cord around the cord pulley as
illustrated. Tighten the fastening well and ensure that
the free end is as short as possible. Secure the end of
the starter cord in the starter handle.
Tensioning the recoil spring
• Guide the cord through the cut-out in the periphery of
the pulley and wind the cord 3 times clockwise around
the centre of the starter pulley.
• Now pull the starter handle and in doing so tension the
spring. Repeat the procedure once more, but this time
with four turns.
• Note that the starter handle is drawn to its correct
home position after tensioning the spring.
• Check that the spring is not drawn to its end position
by pulling out the starter line fully. Slow the starter
pulley with your thumb and check that you can turn the
pulley at least a further half turn.
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English 23