CARBURETTOR
GB
32 – English
Adjustment
!
WARNING!
The guide bar, chain and clutch cover
must be fitted before the saw is started,
otherwise the clutch may come loose
causing personal injury.
L
H
T
Conditions
During all adjustment, the air filter should be clean and the
cylinder cover should be in place. If the carburettor is
adjusted with a dirty air filter, the fuel mixture will be too weak
next time the air filter is cleaned. This can cause serious
engine damage.
Carefully screw in (clockwise) the L- and H-jets fully. Back
them off (anti-clockwise) 1 turn. The carburettor now has the
settings H = 1 and L = 1.
Start the chainsaw according to the starting instructions and
warm up the saw for 10 min.
NOTE! If the chain turns when idling, the T-
screw should be turned anti-clockwise until
the chain stops.
Place the saw on a flat surface so that the guide bar points
away from you and the guide bar is not in contact with the
surface or any other object.
!
WARNING!
Wear ear defenders when making
adjustments with the motor running.
Adjusting the carburettor involves adjusting the motor to the
local conditions e.g. climate, altitude, fuel and type of 2-
stroke oil.
The carburettor is equipped with three adjustment options:
L = Low speed jet
H = High speed jet
T = Idling adjustment
The L- and H-jets adjust the fuel flow to match the airflow that
the throttle valve opening allows. Turning them clock-wise
makes the fuel/air mixture weaker (less fuel) and turning
them anti-clockwise makes the fuel/air mixture richer (more
fuel). A weaker mixture increases the engine speed and a
rich mixture decreases the engine speed.
The T- screw controls the throttle position when idling.
Turning the T-screw clockwise gives faster idling, turning it
anti-clockwise lower idling speed.
Basic settings and running in
For test running at the factory the basic carburettor settings
are used.
The basic settings are H = 11/4 and L = 11/4 turns
respectively.
In order that motor components receive adequate
lubrication (running in) the carburettor should be set to
a somewhat richer fuel mixture for the chainsaw’s first
3-4 running hours. To achieve this, the max. overspeed
is adjusted to 6-700 rpm less than the recommended
max. overspeed.
If it is not possible to check the max. overspeed with a
tachometer then the H-jet should not be set to a weaker
mixture than the basic settings state.
The recommended max. overspeed must not be exceeded.
Note! If the chain turns at idling speed, the T-screw should
be turned anti-clockwise until the chain stops.
Fine adjustment
When the chainsaw is “run in“ fine adjustment of the
carburettor should be carried out. Firstly adjust the L-jet
screw, then the idling screw T and finally the H-jet screw.
The following are the recommended engine speeds:
Max. overspeed Idling speed
13,500 rpm 2700 rpm
For Husqvarna Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
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