Husqvarna 226R, Workshop Manual

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3
15
502 50 83-01
531 03 06-23
Fuel system
Tank venting
Tank venting takes place through the fuel
cap and needs to be functional for the
engine to work.
• Empty the fuel tank.
• Remove the air fi lter cover.
• Remove the transparent fuel hose (A)
(return hose) from the carburettor.
• Connect the fuel hose to pressure
tester no. 531 03 06-23.
• Make sure the hose bushings in the
tank are leak tight.
• Cover the hole in the fuel cap (B) with
your thumb.
• Pump up a vacuum of 50 kPa (0.5
bar) in the tank.
• Remove your thumb from the hole in
the fuel cap.
The pressure should revert to atmo-
spheric pressure within 15 seconds.
Tank venting
Check that the tank venting valve works
correctly.
The fuel cap can be taken apart for clean-
ing.
Use a screwdriver and prise off the hous-
ing (A) that contains the non-return valve
(B) and cover (C).
Blow the fi lter (D) and the hole in the
fuel cap (E) clean with compressed air.
Assemble the fuel cap in reverse order to
that in which it was dismantled.
Make sure the seal (F) is not damaged.
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 using 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 and that the O-ring is suffi
ciently
tight so that the fi lter cannot slide off the
tube.
NOTE!
There is a small slit (G) in the non-
return valve (B) that only becomes
visible when you carefully squeeze
its sides. If the valve is undamaged,
the slit is not visible in its normal
position.
Replace the non-return valve if
necessary.
Fuel fi lter
The fuel fi lter can be removed through the
tank’s fi ll hole.
Clean the fi lter externally if it is not too
dirty.
Replace the fi lter if required.