Husqvarna 325HS75 - Manual (Page 15)

English –
15
MAINTENANCE
Adjust the idling speed with
the screw T, if it is necessary
to readjust. First turn the
idle speed adjusting screw T
clockwise until the blades
start moving. Then turn the
screw anti-clockwise until
the blades stop. The idle
speed is correctly adjusted
when the engine runs
smoothly in every position.
There should also be a good
margin to the rpm at which
the blades start to move.
Correctly adjusted carburettor
A correctly adjusted carburettor means that the machine
accelerates without hesitation and the machine 4-cycles a little
at max speed. Furthermore, the blades must not move at
idling. A too lean adjusted low speed needle L may cause
starting difficulties and bad acceleration.
A too lean adjusted high speed needle H gives lower power =
less capacity, bad acceleration and/or damage to the engine.
A too rich adjustment of the two speed needles L and H gives
acceleration problems or too low working speed.
T
WARNING! Contact your dealer/service workshop if the idle
speed setting cannot be adjusted so that the blades stop. Do
not use the machine until it has been properly adjusted or
repaired.
Adjusting the idle speed, T
H
The high speed needle is adjusted correctly when the machine
‘splatters’ a little . If the machine smokes heavily at the same
time as it ‘splatters’ heavily the adjustment is too rich.
NOTE! For optimum setting of the carburettor, contact a
qualified servicing dealer who has a revolution counter at his
disposal.
The high speed needle
affects the machine’s power,
speed, temperature and fuel
consumption. A too lean
adjustment on the high
speed needle H (the high
speed needle H is screwed
in too much) gives a too
high speed resulting in
engine damage. Do not
allow the engine to run at
full speed for more than 10
seconds.
Apply full throttle and turn
the high speed needle H
slowly anticlockwise until
the engine runs unevenly.
The high speed needle H is
then turned slowly clock-
wise a little until the engine
runs smoothly.
Note the engine should be
run unloaded when
adjusting the high speed
needle.
High speed needle H
H