Husqvarna 326SX Series, Руководство оператора

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English
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MAINTENANCE
Carburetor
Your Husqvarna product has been designed and
manufactured to speci
fi cations that reduce harmful
emissions. After the engine has used 8-10 tanks of fuel the
engine will be run-in. To ensure that it continues to run at peak
performance and to minimise harmful exhaust emissions
after the running-in period, ask your dealer/service workshop
(who will have a rev counter at their disposal) to adjust your
carburettor.
Function
• The carburetor governs the engine’s speed via the throttle
control. Air and fuel are mixed in the carburetor. The air/
fuel mixture is adjustable. Correct adjustment is essential
to get the best performance from the machine.
• The setting of the carburetor means that the engine is
adapted to local conditions, for example, the climate,
altitude, fuel and the type of 2-stroke oil.
• The carburetor has three adjustment controls:
L = Low speed jet
H = High speed jet
T = Idle adjustment screw
• The L and H-jets are used to adjust the supply of fuel to
match the rate that air is admitted, which is controlled with
the throttle. If they are screwed clockwise the air/fuel ratio
becomes leaner (less fuel) and if they are turned anti-
clockwise the ratio becomes richer (more fuel). A lean
mixture gives a higher engine speed and a rich mixture
gives a lower engine speed.
• The T-screw regulates the throttle setting at idle speed. If
the T-screw is turned clockwise this gives a higher idle
speed; turning it anti-clockwise gives a lower idle speed.
Basic setting
• The basic carburetor settings are adjusted during testing
at the factory. The basic setting is richer than the optimal
setting and should be maintained for the
fi rst few hours the
machine is in use. The carburettor should then be fi nely
adjusted. Fine adjustment should be carried out by a
skilled technician.
CAUTION! If the sweeper rollers rotates/moves while the
engine is idling, the T-screw should be turned anti-clockwise
until the sweeper rollers stops.
Rec. idle speed 2700 rpm
Recommended max. speed: See the Technical data section.
Fine adjustment
• When the machine has been ”run-in” the carburetor
should be
fi nely adjusted. The fi ne adjustment should
be carried out by a quali fi ed person. First adjust the L-
jet, then the idling screw T and then the H-jet.
Conditions
• Before any adjustments are made, make sure that the air
fi lter is clean and the air fi lter cover is fi tted. If you adjust
the carburettor when the air fi lter is dirty it will result in a
leaner mixture when the fi lter is fi nally cleaned. This can
lead to serious engine damage.
• Carefully turn both jets, L and H, so that they are midway
between fully screwed in and fully screwed out.
• Do not attempt to adjust the L and H jets beyond either
stop as this could cause damage.
• Now start the machine according to the starting
instructions and let it warm up for 10 minutes.
CAUTION! If the sweeper rollers rotates/moves while the
engine is idling, the T-screw should be turned anti-
clockwise until the sweeper rollers stops.
!
WARNING! The complete clutch cover and
shaft must be
fi tted before the machine is
started, otherwise the clutch can come loose
and cause personal injury.
!
WARNING! If the idling speed cannot be
adjusted so that the sweeper rollers stops,
contact your service workshop. Do not use
the machine until it has been correctly
adjusted or repaired.