Carburetor; Fuel Filter; Fuel Pump, Air Purge; Replacing The Fuel Filter - Husqvarna 525P4S Workshop Manual

7.11 Replacing the fuel filter

The fuel hose in the tank contains a fuel filter. It is
accessible through the fill hole. Pull out the filter
with your fingers or with help of tool 502 50 83-01.
If the filter 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 filter's connection neck is
inserted as far as possible into the fuel hose and
that the clip is sufficiently tight so that the filter
cannot slide off the tube.

7.12 Air purge

The fuel pump has the task of facilitating the
start of the engine when cold. The pump fills the
carburetor with fuel before attempting to start the
engine. This also prevents 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.

7.13 Carburetor

1. Remove the air filter cover and blow the carbu-
retor compartment clean with compressed air.
2. Disconnect the throttle cable from the lever arm
on the carburetor and from the guide in the
insulator.
3. Remove carburetor screws and the fuel pipe.
4. Move the air filter housing to the side, remove
the fuel pipe and lift off the carburetor.
Repair instructions
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