MAINTENANCE
CarburettorBasic setting
Your Husqvarna product has been designed and manufactured
to speciŢ cations that reduce harmful emissions.? The carburettor is set to its basic setting when test run at the
After your unit has been run 8-10 tanks of fuel the engine has factory. The basic setting is richer than the optimal setting
broken in. To ensure that your unit is at peak performance and and should be kept during the machine?s Ţ rst working hours.
producing the least amount of harmful emissions after break Thereafter the carburettor should be Ţ nely adjusted. Fine
in, have your authorized servicing dealer, who has a revolution adjustment should be carried out by a skilled technician.
counter at his disposal, to adjust your carburettor for optimum
operating conditions.NOTE! If the blade rotates while the engine is idling the T screw
should be turned anticlockwise until the cutting attachment
stops.
WARNING! Rec. idling speed: 2 700 rpm.
The complete clutch cover with shaft must Rec. max speed: See Technical data.
!be Ţ tted before the machine is started,
otherwise the clutch can become loose and WARNING!
cause personal injury.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
Operationor repaired.
? The carburettor governs
the engine?s speed via the Fine adjustment
throttle. Air/fuel is mixed in ? When the machine has been ?run-in? the carburettor should
the carburettor. The air/fuel be Ţ nely adjusted. The Ţ ne adjustment should be carried
out by qualiŢ ed person. First adjust the L-jet, then the idling
mixture is adjustable. To screw T and then the H-jet.
take advantage of the
engine?s optimal output the
adjustment must be correct.Conditions
? Before any adjustments are made the air Ţ lter should be clean
? The setting of the and the air Ţ lter cover Ţ tted. Adjusting the carburettor while a
carburettor means that the dirty air Ţ lter is in use will result in a leaner mixture when the
engine is adapted to local Ţ lter is Ţ nally cleaned. This can give rise to serious engine
conditions, for example, the damage.
climate, altitude, petrol and ? Turn the L and H needles carefully to the middle point
the type of 2-stroke oil.between fully screwed in and fully screwed out.
? Do not attempt to adjust the needles beyond the stops as
? The carburettor is equipped damage can occur.
with three adjustment ? Now start the machine as set out in the start instructions and
possibilities:run it warm for 10 minutes.
L = Low speed needle NOTE! If the cutting equipment rotates/moves while idling
H = High speed needlethe T screw should be turned anticlockwise until the cutting
T = Idle speed adjuster equipment stops.
screw
Low speed needle L
Try to Ţ nd the highest idling
? The fuel quantity in relation to the air � ow permitted by the speed, turning the low
throttle opening is adjusted using the L and H-needles. speed needle L clockwise
Turning the needles clockwise gives a leaner fuel mixture respectively counter-
(less fuel) and turning them anticlockwise gives a richer fuel clockwise. When the highest
mixture (more fuel). A leaner mixture gives high revs while a speed has been found, turn
richer mixture give less revs.the low speed needle L 1/4
turn counter-clockwise.
? The T-screw regulates the position of the throttle while the NOTE! If the cutting
engine is idling. Turning the screw clockwise gives a higher attachment rotates/moves in
idling speed while turning it anticlockwise gives a lower idling the idling position, turn the
speed.idling speed screw T counter-
clockwise until the cutting
attachment stops.
16 - English |
ACEC
