Maintenance, Carburettor | Husqvarna 323E instruction

MAINTENANCE

Carburettor

Your Husqvarna product has been designed and manufactured to speciﬁcations that reduce harmful emissions.

After your unit has been run 8-10 tanks of fuel the engine has broken in. To ensure that your unit is at peak performance and producing the least amount of harmful emissions after break in, have your authorized servicing dealer, who has a revolution counter at his disposal, to adjust your carburettor for optimum operating conditions.

!WARNING!

The complete clutch cover with shaft must be ﬁtted before the machine is started, otherwise the clutch can become loose and cause personal injury.

Operation

• The carburettor governs the engineʼs speed via the throttle. Air/fuel is mixed in the carburettor. The air/fuel mixture is adjustable. To take advantage of the engineʼs optimal output the adjustment must be correct.

•The setting of the carburettor means that the

engine is adapted to local conditions, for example, the climate, altitude, petrol and the type of 2-stroke oil.

•The carburettor is equipped with three adjustment possibilities:

L = Low speed needle H= High speed needle T = Idle speed adjuster

screw

•The fuel quantity in relation to the air ﬂow permitted by the throttle opening is adjusted using the L and H-needles. Turning the needles clockwise gives a leaner fuel mixture (less fuel) and turning them anticlockwise gives a richer fuel mixture (more fuel). A leaner mixture gives high revs while a richer mixture give less revs.

•The T-screw regulates the position of the throttle while the engine is idling. Turning the screw clockwise gives a higher idling speed while turning it anticlockwise gives a lower idling speed.

Basic setting

•The carburettor is set to its basic setting when test run at the factory. The basic setting is richer than the optimal setting and should be kept during the machineʼs ﬁrst working hours. Thereafter the carburettor should be ﬁnely adjusted. Fine adjustment should be carried out by a skilled technician.

NOTE! If the blade rotates while the engine is idling the T screw should be turned anticlockwise until the cutting attachment stops.

Rec. idling speed: 2 700 rpm.

Rec. max speed: See ”Technical data”.

!WARNING!

If the idling speed cannot be adjusted so that the cutting attachment stops, contact your service workshop. Do not use the machine until it has been correctly adjusted or repaired.

Fine adjustment

•When the machine has been ”run-in” the carburettor should be ﬁnely adjusted. The ﬁne adjustment should be carried out by qualiﬁed person. First adjust the L-jet, then the idling screw T and then the H-jet.

Conditions

•Before any adjustments are made the air ﬁlter should be clean and the air ﬁlter cover ﬁtted. Adjusting the carburettor while a dirty air ﬁlter is in use will result in a leaner mixture when the ﬁlter is ﬁnally cleaned. This can give rise to serious engine damage.

•Turn the L and H needles carefully to the middle point between fully screwed in and fully screwed out.

•Do not attempt to adjust the needles beyond the stops as damage can occur.

•Now start the machine as set out in the start instructions and run it warm for 10 minutes.

NOTE! If the cutting equipment rotates/moves while idling the T screw should be turned anticlockwise until the cutting equipment stops.

Low speed needle L

Try to ﬁnd the highest idling speed, turning the low speed needle L clockwise respectively counter- clockwise. When the highest speed has been found, turn the low speed needle L 1/4 turn counter-clockwise. NOTE! If the cutting attachment rotates/moves in the idling position, turn the idling speed screw T counter- clockwise until the cutting attachment stops.

16 – English