Husqvarna K1270 Workshop Manual page 48

Carburettor
CHANNELS
BLOWING CLEAN THE CARBURETTOR
In connection with a service on the carburettor it
is appropriate to blow out any particles from the
channels using compressed air. The measurement
chamber diaphragm and the pump diaphragm as
well as the needle valve must be dismantled before
starting to blow clean. Open the choke valve to give
free air passage through the venturi.
The rings indicate where blowing clean should be
done.
VALVE AXLES
Leakage from the valve axles results in incorrect
fuel/air mixture and to dust penetration in the
engine.
Check that there is no radial play on the valve
axles. Damper shafts and seals can be replaced. If
a gap in the throttle shafts occurs, you can assume
that the carburettor is badly worn and you should
consider replacing the whole carburettor.
ADJUSTMENT
The carburettor's low and high speed nozzles have
been factory set. There must be no after adjust-
ments.
IDLE SPEED
The idling screw actuates the throttle valve's
opening mechanically. Use special tool (501 60
02-03). Adjust as described below.
48
- English
CHANNELS TOP
CHANNELS BOTTOM
VALVE AXLES
CARBURETTOR - IDLE SPEED ADJUSTMENT