Maintenance; Operation - Husqvarna 326HE4 x-series Operator's Manual

MAINTENANCE
Carburettor
Your Husqvarna product has been designed and caanufactured
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 arm
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.
Operation
• The carbm-ettor governs
the engine's speed via the
throttle. Air/fuel is mixed
in the carburettol_ The
air/fuel mixture is
adjustable. To take
advantage of the engine's
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 arm the
type of 2-stroke oil.
L
• The carburettor is equipped with three adjustment possi-
bilities:
H = High speed needle
L = Low 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 anti-clockwise 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 anti-clockwise 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 arm should be kept during the machine's first
working hours. Thereafter the carburettor should be finely
adjusted. Fine adjustment should be carried out by a skilled
technician.
NOTE! If
the cutting attachment rotates/moves while the
engine is idling the T-screw should be turned anti-clockwise
until the cutting attachment stops.
Recommended idling speed is 2 700 rpm.
Recommended max. speed: See "technical data"
Fine adjustment
• When the machine has been "runqn" 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 -irfil _ _'rshould be
clean and the airfilter cover fitted. Adj _sti g the car _ drettor
while a ditty airfilter is in use will resui b a leane mixture
when the filter is finally cleaned. This c h give • se to serious
engine damage.
• Carefully turn the L arm H needle to the mtd point between
fully turned in arm fully turned out.
• Do not attempt to adjust the needles beyond the stops as
damage can occur.
•
Now
start the machine according to the starting instructions
and run it warm for 10 minutes.
NOTE!
If the cutting attachment rotates/moves the
T
screw
should be turned anti-clockwise until the cutting attachment
stops.
Low speed needle L
Try tO firm 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 blades move
when the engine is idling,
turn the idling speed screw
W
counter-clockwise until
the blades stop.
I I
English -
15