CARBURETTOR
English – 33
Fig. 17
Fig. 18
Pressure testing
Pressure testing should be carried out with the carburettor
fully assembled. Testing should always be carried out
after the carburettor has been repaired, but can also be
performed for trouble shooting before dismantling.
Refer to fi g. 17 and carry out the test as follows:
1. Screw in the high and low speed jet screws and back
them
off one turn.
2. Connect pressure tester 531 03 06-23 to the
carburettor fuel inlet.
3. Lower the carburettor into a beaker of water.
4. Pump up the pressure to 50 kPa (0.5 bar) and
clamp the pump tube.
5. There should be no leakage. If leakage occurs, refer
to the table below.
Leakage at
Fault with
Diff
user
jets
Needle
valve
Leakage in impulse tube
Pump diaphragm
Ventilation hole above
Control
diaphragm
metering
unit
Refi tting to the chainsaw
See fi g. 18.
1. Loosen the air fi lter holder and position the
carburettor in place in the saw.
2. Bolt together the fi lter holder, carburettor and air
intake tube. Tighten the bolts to 1.5 Nm.
3. Refi t the fuel pipe (B) to the fuel nipple and tube (C)
to the impulse nipple.
4. Refi t the throttle cable and choke control.
5. Refi t the carburettor control (A).
6. Refi t the cylinder cover and air fi lter.
