Husqvarna 3120K manual Carburetor, Functioning, Final setting Operation, High speed jet

MAINTENANCE

Carburetor

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 check your carburetor for optimum operating conditions.

Functioning, Final setting

!WARNING! Do not start the power cutter without the cutting arm or cutting head fitted. Otherwise the clutch can come loose and cause personal injury.

Operation

•The carburetor governs the engine speed via the throttle. Air/ fuel are mixed in the carburetor

High speed jet

The carburetor is equipped with fixed H-jet to ensure the engine always receives the correct fuel air mixture.

If the engine lacks power or accelerates poorly do the following:

•Inspect or, if necessary, replace the air filter.

•If this does not help, contact an authorised service workshop.

Low speed needle L

Apply full throttle a couple of times and check that the saw is accelerating without hesitation.

Basic setting L: 1 1/4 turn open.

If an adjustment is necessary, try to reach the maximum idle speed, by slowly closing the low speed needle L clockwise until the engine starves from fuel. Then open (counter-clockwise) 1/8 of a turn.

Check the engine acceleration.

NOTE!

A too lean adjusted low speed needle (the L-needle closed too much) results in starting difficulties.

Final setting of the idling speed T

Adjust the idling speed with the screw T. If it is necessary to re- adjust, first turn the idle speed adjusting screw T clockwise, until the blade starts to rotate. Then turn, counter-clockwise until the blade stops. A correctly adjusted idle speed setting occurs when the engine runs smoothly in every position. It should also be good margin to the rpm when the blade starts to rotate.

Recommended idling speed: 2 500 rpm.

!Contact your servicing dealer, if the idle speed setting cannot be adjusted so that the blade stops. Do not use the power cutter until it has been properly adjusted or repaired.

L

T

English – 17