MAINTENANCE
GeneralBasic settings and running in
The user must only carry out the maintenance and service The basic carburettor settings are adjusted during testing at
work described in this OperatorOs Manual. More extensive the factory. Avoid running at a too high speed during the Ţrst
10 hours.
work must be carried out by an authorised service workshop.
CAUTION! If the chain rotates while idling the T-screw
must be turned anti-clockwise until the chain stops.
Carburettor adjustment
Rec. idle speed: 2700 rpm
Due to existing environmental and emissions legislation your
chain saw is equipped with movement limiters on the
Fine adjustment
carburettor adjuster screws. These limit the adjustment
possibilities to a maximum of a 1/2 turn.When the machine has been �run-in� the carburettor should
be Ţnely adjusted. The Ţne adjustment should be carried out H
Lby a qualiŢed person. First adjust the L-jet, then the idling
screw T and then the H-jet.
1/2
1/2Changing the type of fuel
Fine tuning may be required if the chain saw, after changing
the type of fuel, performs differently with regard to starting,
Your Husqvarna product has been designed and
manufactured to speciŢcations that reduce harmful acceleration, maximum speed, etc.
emissions.
Conditions
Function
Y Before any adjustments are made the air Ţlter should be
Y The carburettor governs the engineOs speed via the clean and the cylinder cover Ţtted. Adjusting the
throttle control. Air and fuel are mixed in the carburettor. carburettor while a dirty air Ţlter is in use will result in a
leaner mixture next time the Ţlter is cleaned. This can give
The air/fuel mixture is adjustable. Correct adjustment is
essential to get the best performance from the machine.rise to serious engine damage.
Y Do not attempt to adjust the L and H jets beyond either
Y Adjusting the carburettor means that the engine is
adapted to local operating conditions, e.g. climate, stop as this could cause damage.
altitude, petrol and the type of 2-stroke oil.Y Now start the machine according to the starting
Y The carburettor has three adjustment controls:instructions and let it warm up for 10 minutes.
- L = Low speed jetY Place the machine on a �at surface so that the bar points
away from you and so that the bar and chain do not come
- H = High speed jetinto contact with the surface or other objects.
- T = Idle adjustment screw
Low speed jet L
Turn the low speed jet L clockwise until it stops. If the engine L
Haccelerates poorly or idles unevenly, turn the low speed jet L
anticlockwise until good acceleration and idling are achieved.
Fine adjustment of the idle speed T
Adjust the idle speed with the T-screw. If it is necessary to re-
adjust, turn the T-screw clockwise while the engine is running, T
until the chain starts to rotate. Then turn anti-clockwise until
Y The L and H-jets are used to adjust the supply of fuel to the chain stops. When the idle speed is correctly adjusted the
match the rate that air is admitted, which is controlled with engine should run smoothly in every position and the engine
the throttle. If they are screwed clockwise the air/fuel ratio speed should be safely below the speed at which the chain
becomes leaner (less fuel) and if they are turned anti-starts to rotate.
clockwise the ratio becomes richer (more fuel). A lean
mixture gives a higher engine speed and a rich mixture
gives a lower engine speed.WARNING! Contact your servicing dealer, if
the idle speed setting cannot be adjusted so
Y The T-screw regulates the throttle setting at idle speed. If !that the chain stops. Do not use the chain
the T-screw is turned clockwise this gives a higher idle saw until it has been properly adjusted or
speed; turning it anti-clockwise gives a lower idle speed.repaired.
English � 31 |
ACEC
