Fuel Tank; Fuel Filter - Husqvarna 131R Workshop Manual

8.7 Fuel tank

8.7.1 To do a fuel tank venting
Fuel tank venting must be done correctly for the engine
to operate satisfactorily.
1. Empty the fuel tank.
2. Remove the air filter cover.
3. Remove the transparent fuel hose from the
carburetor.
4. Connect the fuel hose to a pressure tester. Refer to
Servicing tools on page 16 .
5. Examine the hose bushings in the fuel tank for
leaks.
6. Put your thumb on the hole in the fuel tank cap.
7. Pump up a vacuum of 0.5 bar in the fuel tank.
8. Remove your thumb from the hole in the fuel tank
cap.
The pressure decreases to atmospheric pressure in less
than 15 seconds.
8.7.2 To clean and examine the fuel tank
1. Disassemble the fuel tank cap for cleaning. Use a
screwdriver to remove the housing (A) that contains
the check valve (B) and cover (C).
2. Use compressed air to clean the filter (D) and the
hole in the fuel tank cap (E).
3. Examine the check valve.
a) Press the sides of the check valve to see a small
space (G). If you can see the space when you
do not press the sides of the check valve, the
valve is damaged.
b) Replace the check valve if it is damaged.
30 - Repair instructions
4. Assemble the fuel tank cap. Make sure the seal (F)
is not damaged.
E E
D
B G A
5. Attach the fuel tank cap to the fuel tank.

8.8 Fuel filter

8.8.1 To remove the fuel filter
1. Loosen the hose clamp (A).
A
2. Pull out the filter through the opening in the fuel tank
with a hook. Refer to
C
F
Servicing tools on page 16 .
675 - 002 - 23.04.2018