Dismantling The Carburettor - Husqvarna 122C Workshop Manual

Fuel system
Dismantling the
carburettor
The metering unit
Remove the 4 screws (A) and pull apart
the various parts for inspection and pos-
sible replacement.
Check the non-return valve and the con-
trol diaphragm for damage.
Remove the needle valve.
Dismantling the
carburettor
The metering unit
Remove the 4 screws (A) and lift off the
cover (B) and the pump bellows (C).
Remove the non-return valve (D) using a
small screwdriver.
Lift off the diaphragm cover (E).
Carefully remove the control diaphragm
(F) and any gasket (G).
Check the non-return valve (D) to make
sure the gap (E) closes tightly.
If this is not the case the valve should be
replaced with a new one.
Check that the pin (F) on the control dia-
phragm and contact surface on the needle
valve is not worn.
Also check the diaphragm by holding it
up to a light for instance to discover any
holes in the material.
Replace damaged parts with new ones.
Remove the needle valve.
Loosen the bolt and remove the lever arm,
axle, needle valve and spring.
3
19