2-20 FUEL SYSTEM
Gasoline is extremely flammable and can be ex-
plosive under certain conditions. Turn the ignition
switch OFF. Do not smoke. Make sure the area is
well-ventilated and free from any source of flame
or sparks; this includes any appliance with a pilot
Remove the carburetors.
Before disassembling the carburetors, check the fuel level
(see Fuel level Inspection).
* Ifthe fuel level is incorrect, inspect the rest of the carbu-
retor before correcting it.
Slide the starter plunger.lever [A]to the left and release
it to check that the starter plungers move smoothly and
return by spring tension.
* Ifthe starter plungers do not work properly, replace the
Turn the throttle cable pulley [B]to check that the throttle
butterfly valves move smoothly and return by spring ten-
*If the throttle valves do not move smoothly, replace the
Disassemble the carburetors.
Clean the carburetors.
Check that the O-rings on the float bowl and pilot screw
and the diaphragmon the vacuumpistonare ingood
*If any of the O-rings or diaphragms are not in good con-
dition, replace them.
Check the plastic tip [A]of the float valve needle [B]. It
should be smooth, without any grooves, scratches, or
*If the plastic tip is damaged [C], replace the needle.
. Push the rod  in the other end of the float valve needle,
and then release it [E].
*If the rod does not spring out, replace the needle.
Check the tapered portion [A] of the pilot screw [B] for
wear or damage.
Ifthe pilot screw is worn or damaged on the tapered por-
tion, it willprevent the engine from idling smoothly. Re-
GC060405S 1 C
GC060406S 1 C