Cub Cadet CC 4BP 32cc - Manual (Page 27)

FUEL SYSTEM AND CARBURETOR
24
7j. The fuel pump in the carburetor is driven by
vacuum pulses in the intake port. The
impulse port from the spacer lets the vac-
uum pulses into the pump chamber.
See Figure 5.14.
7k. Make sure this port is clean and free of
debris.
7l. Set the needle valve lever as per the carbu-
retor manufacturer’s recommendations
using a W-tool. See Figure 5.15.
7m. There are ports in the metering valve body.
it is important to make sure they are clean
and free of debris.
7n. Follow steps in reverse order to rebuild the
carburetor.
8. Perform a needle valve pop off test by following
the carburetor manufacturer’s recommenda-
tions.
9. Install the carburetor on the engine.
10. Test run the engine before returning it to service.
Figure 5.14
Impulse port
Figure 5.15
Needle valve lever