Husqvarna 326C, 326L, 326LX-Series, 326LDX-Series, Руководство по ремонту

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3
Fuel system
502 71 14-01
501 60 02-03
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 (fast idle speed is 600–800 rpm under the
recommended max. speed) and should be kept during the engine’s first working
hours. Thereafter the carburettor should be fine tuned.
The default setting is:
H = 2 revolution open
L = 1 revolution open
Carburettor adjustment
Fine adjustment of the carburettor should be carried out after the engine has been
“run-in”.
• The air filter should be clean and the cylinder cover fitted when all adjustments
are made.
First adjust the L-needle, then the H-needle and finally the idling speed’s
T-screw.
Idling speed = 2,800 rpm.
NOTE!
Always use a tachometer when adjusting the carburettor.
The recommended max. speed must not be exceeded.
Correctly adjusted carburettor
A correctly adjusted carburettor means that the engine accelerates without
hesitation and it “splatters” a little at full throttle.
• A too lean adjusted L-needle can cause starting difficulties and poor
acceleration.
• A too lean adjusted H-needle results in lower power, poor acceleration and/or
damage to the engine.
• A too rich setting of the “L” and “H” needles give acceleration problems or a too
low working speed.
NOTE!
If the cutting equipment rotates while idling the T-screw should be turned
anticlockwise until it stops.