VESPA GT 200, Руководство по ремонту

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10.11.10.2 Walbro WVF-7P Carburetor
-
Holding the carburetor upside-down, check that
the float is parallel to the plane of the bowl.
- If found to be out of alignment, adjust by
bending the metal tab that controls the needle,
until corrected.
- When making adjustments to the metal tab,
ensure it remains parallel to the pin on which
the float hinges.
Note: With the carburetor tilted upside-down, the
float must not overcome the load of the float pin
spring. If the float remains in position, check that
it is not burdened with fuel infiltrations. Replace
the float and/or pin as necessary.
- Thoroughly clean and blow the fuel conveying cap and insert it onto the starter jet.
Note: Failure to install this component results in worse cold starting performance, since the
starter jet draws old fuel from the bottom of the bowl.
-
Remove the float bowl drainage screw and then
thoroughly clean and blow out the bowl, paying
particular attention in cleaning the accelerator
pump ducts.
-
Repeatedly actuate the accelerator pump piston
and blow with compressed air.
- Check that the accelerator pump piston and
seat are free from wear. If worn, replace.
- Check that the accelerator pump piston spring
is not worn.
-
Install a new O-ring and gasket; hence replace
the piston unit on the bowl.
- Install a new O-ring on the drainage screw and
tighten it.