Lack of Power

POSSIBLE CAUSE ACTION

Sticking venturi valve or leaking Check, clean and service as
diaphragm required

Venturi valve limiter out of Adjust as required.
adjustment. Refer to SPECIFICATIONS.

Accelerator pump not functioning Service as required.
or improper adjustment. Check
visually for fuel discharge

Control vacuum regulator off Check and adjust as required
specification (high)

Plugged pump discharge nozzle Clean nozzle with compressed air.

Leaking fuel at pump discharge Replace gasket.
nozzle screw gasket.

Improper float setting Adjust float level. Refer to
ADJUSTMENT PROCEDURES.

Main metering system plugged, Clean fuel system as required.
contaminated fuel

Venturi Valve Diaphragm failure Replace diaphragm.

Feedback motor Check for smooth operation. Refer
FEEDBACK CARBURETOR ACTUATOR MOTOR.

Fuel filter or fuel delivery lines Check fuel delivery.
Refer to FUEL PUMP TEST.

Carburetor feedback system Refer to COMPUTERIZED
ENGINE CONTROLS.

Secondary throttle plates stuck Check and service as required.
closed