CARBURETTOR
GB
English – 31
Pressure testing
Fig. 17
A
C
B
DD
Fig. 18
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 fig. 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 502 50 38-01 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
Diffuser jets Needle valve
Leakage in impulse tube Pump diaphragm
Ventilation hole above Control diaphragm
metering unit
Refitting to the chainsaw
See fig. 18.
1. Loosen the air filter holder and position the carburettor in
place in the saw.
2. Bolt together the filter holder, carburettor and air intake
tube. Tighten the bolts to 1.5 Nm.
3. Refit the fuel pipe (B) to the fuel nipple and tube (C) to the
impulse nipple.
4. Refit the throttle cable and choke control.
5. Refit the carburettor control (A).
6. Refit the cylinder cover and air filter.
See instruction book.
For Husqvarna Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
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