Husqvarna 129C Workshop Manual page 39

5
Fit the carburettor needles.
Screw them in so that they just reach the bottom of
the needle seat. See figure 54.
Then screw them out according to the basic
setting:
H = 2 1 / turns
2
1
L = 1 / turns
8
NOTE!
The H-needle is a little shorter than the
L-needle.
6
Connect the pressure tester no. 531 03 06-23 to
the fuel hose nipple (by the carburettor needles).
Lower the carburettor in a vessel with petrol in
order to discover any leaks more easily. See
figure 55.
Test the pressure at 50 kPa.
No leakage is permitted.
7
Assemble the various parts of the pump unit. See
figure 56.
Check that there are no holes in the pump
diaphragm (C) by holding it up to a light for
instance.
Do not forget the fuel screen (D).
Make sure that it is not damaged or dirty.
NOTE!
During assembly the pump diaphragm
must lie closest to the carburettor
housing.
Fig 54
Fig 55
Fig 56
Fuel system
39
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