MAINTENANCE
CarburettorBasic setting
Your Husqvarna product has been designed andY The carburettor is set to its basic setting when test run at the
manufactured to specifications that reduce harmfulfactory. The basic setting should be kept during the
emissions.machine�s first working hours. Thereafter the carburettor
After your unit has been run 8-10 tanks of fuel the engineshould be finely adjusted. Fine adjustment should be carried
has broken in. To ensure that your unit is at peakout by a skilled technician.
performance and producing the least amount of harmful
emissions after break in, have your authorized servicingNOTE! If the cutting attachment rotates/moves in the idling
dealer, who has a revolution counter at his disposal, to adjustposition, turn the idling speed screw counter-clockwise until
your carburettor for optimum operating conditions.the blade stops.
Rec. idling speed: 2700 rpm.
WARNING!
Recommended max. speed: See Otechnical data�.The complete clutch cover with shaft must
!
be fitted before the machine is started,
otherwise the clutch can become looseWARNING!
and cause personal injury.
Contact your servicing dealer, if the idle
!speed setting cannot be adjusted so
that the cutting attachment stops. Do
Functioningnot use the machine until it has been
Y The carburettor governsproperly adjusted or repaired.
the engine speed via the
throttle trigger. In the
carburettor, air/fuel isFine adjustment
mixed. This air/fuel
mixture is adjustable. IfY When the machine has been �run-in� the carburettor should
be finely adjusted. The fine adjustment should be carried
you want to take
advantage of theout by qualified person. First adjust the L-jet, then the
idling screw T and then the H-jet.
maximum output of the
engine, the setting must be
corret.Conditions
Y Before any adjustments are made the airfilter should be clean
Y The setting of the
carburettor means that theand the airfilter cover fitted. Adjusting the carburettor while
a dirty airfilter is in use will result in a leaner mixture when
engine is adjusted to localthe filter is finally cleaned. This can give rise to serious
conditions, for example
climate, altitude, petrolengine damage.
Y Carefully turn the L and H needle to the mid point between
and type of two-stroke oil.
Y The carburettor has threefully turned in and fully turned out.
Y Do not attempt to adjust the needles beyond the stops as
adjustment possibilities:damage can occur.
L= Low speed needle
H= High speedY Now start the machine according to the starting instructions
and run it warm for 10 minutes.
adjustment screwNOTE! If the cutting attachment rotates/moves the T screw
T= Idle speed adjustment
screwshould be turned anti-clockwise until the cutting attachment
stops.
Y The fuel quantity required in proportion to the airflow the
Low speed needle L
throttle trigger level allows is adjusted by means of the L-Try to find the highest idling
and H-needles. Turning the needles clockwise gives a leaner
fuel mixture (less fuel), turning them counter-clockwise givesspeed, turning the low speed
needle L clockwise
a richer fuel mixture (more fuel). A lean mixture gives higher
rpms and a rich one lower rpms.respectively counter-
clockwise. When the highest
Y The idling speed screw T regulates the position of thespeed has been found, turn
throttle lever in the idling speed position. Turn the idling
speed screw clockwise gives a higher idling speed, turn itthe low speed needle L 1/4
turn counter-clockwise.
counter-clockwise a lower idling speed.
NOTE! If the cutting+ 1/4
attachment rotates/moves in
the idling position, turn the
idling speed screw T
counter-clockwise until the
cutting attachment stops.
L
24 � English |
ACEC
