Fuel Fi Lter; Fuel Pump; Carburettor - Husqvarna 122C Workshop Manual

Fuel system
Check that the slot in the non-return valve
(B) is not damaged.
Clean the foamed plastic fi lter (C).
Replace damaged components.
Fuel fi lter
The fuel fi lter can be removed through the
tank's fi ll hole.
502 50 83-01

Fuel pump

The fuel pump facilitates cold starts.
The pump cannot be repaired and must
be replaced if it stops working.
Note how the fuel hoses are connected to
simplify assembly.

Carburettor

Dismantling
Blow clean the carburettor compartment
and disconnect the throttle cable from the
carburettor.
Remove the screws and fuel pipes and lift
off the carburettor.
502 71 27-02
Remove the fi lter housing (A) from the
bracket (D) on the carburettor cover using
fl at nose pliers.
Remove the fi lter (C) using a pointed ob-
ject. Clean the fi lter in warm soapy water.
A damaged fi lter should be replaced with
a new fi lter.
Remove the non-return valve (B) using
a pointed object. If the sealing slot in the
fl at end of the valve is damaged, the valve
must be replaced.
Fuel fi lter
The fuel hose in the tank contains a fuel
fi lter. It is accessible through the fi ll hole.
Pull out the fi lter with your fi ngers or with
help of tool 502 50 83-01.
If the fi lter is not too dirty, its surface can
be cleaned with a brush.
Otherwise it must be replaced.
Check the fuel hose for cracks and leaks.
Make sure that the fi lter's connection neck
is inserted as far as possible into the fuel
hose.
Fuel pump
The fuel pump has the task of facilitating
the start of the engine when cold. The
pump fi lls the carburettor with fuel before
attempting to start the engine. This also
prevents vapour bubbles from blocking the
narrow fuel channels.
If the pump does not work it must be
replaced.
Note how the fuel hoses are connected to
simplify assembly.
Carburettor
Dismantling
1. Remove the carburettor cover and blow
the carburettor compartment clean with
compressed air. Remove the air fi lter.
2. Disconnect the throttle cable from the
lever arm on the carburettor and from
the guide in the air fi lter holder.
3. Remove the tank venting hose (A) from
its bracket, the three carburettor screws
(B) and the air fi lter holder (C).
4. Remove the fuel hoses and lift off the
carburettor.
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