Dismantling The Carburettor - Husqvarna 165 R Workshop Manual

Dismantling the carburettor

Clamp the cleanse saw in fixture No 502 51 03-01.
Remove the cylinder casing and blow as much dirt as
possible away from the area round the carburettor,
using compressed air
Remove the sparking plug cover and air cleaner Do not
yet remove the plastic sleeve over the carburettor adju-
sting screws as this is held in place by a nail
Close the choke flap to prevent dirt from entering the
cylinder Disconnect the fuel line and back off the two
nuts (nut driver No 502 50 22-01) holding the carburet-
tor place.
Open the choke flap and pull the carburettor straight
out to the rear.
Remove the small nail holding the plastic sleeve in position
over the adjusting screws and remove the sleeve.
Clean the outside of the carburettor.
Back off the four screws holding the diaphragm cover in
place and remove the cover Remove the diaphragm
Note that the centre stud of the diaphragm enters a
fork-shaped opening in the needle valve lever
Connect pressure tester No 502 50 38-01 to the fuelinlet
on the carburettor and pump it up to a pressure of
2
0 03 MPa (0 3 kgf/cm )
Check whether any leakage occurs at the needle valve
or at the gasket on the pump side Leakage points can
most easily be located by dripping petrol onto the places
where leakage is suspected.
Back off the screw holding the shaft on which the lever
pivots and remove lever, shaft, spring and needle valve
4:1