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Fuelsystem I
Removalof carburetor
Remove the air filter and the fuel hose.
Remove the throttle push rod from the plastic lever with a pair of flat hose
pliers.
Remove the stop switch in order to get at the left screw that retains the carbu-
retor,
Push out the choke control from the lever on the carburetor.
Loosen the screw that connects the air filter elbow to the crankcase.
Loosen the socket head screws that retain the carburetor (use the Allen key
No. 502501 8-01) and lift the carburetor off together with the air filter el-
bow and the screws.
Clean the carburetor on the outside.
Remove the metering diaphragm cover and the metering diaphragm.
Note that the centre pin of the diaphragm enters the forked end of the lever of
the needle valve,
Connect the pressure gauge 5025038-01 to the fuel inlet of the carburetor
and pump until a pressure of 0.03 MPa (0.3 kp/cm2 ) is reached.
Check for any leakage at the needle valve or at the gasket on the pump side.
The easiest way of locating leakages is to pour some petrol where you suspect
the leakages to be.
Loosen the screw that retains the bearing shaft of the lever and remove lever,
shaft, spring and needle valve.
Drill a small hole in the welch plugs (approx. @ 2 mm) and prise away the plugs
by means of a pointed tool.
NOTE! Drill with care in order not to damage the carburetor housing.
Unscrew the two adjusting needles.
Remove the cover above the pump diaphragm and remove diaphragm and
gasket.
Lift off the fuel screen carefully by means of a pointed tool.
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