Reduced Top Speed Power

POSSIBLE CAUSE ACTION

Venturi valve sticking Check, clean and service as
required.

Incorrect venturi valve WOT adjustment Refer to Adjustment Procedures.

Binding throttle linkage Clean and service as required.

Venturi valve diaphragm leaking Check and service as required.

Low fuel pump volume Test fuel delivery system. Refer to
FUEL PUMP TEST.

Metering rods bent Service as required.

Incorrect float level Adjust float level and drop, check
float hinge pin for binding; service
and adjust as required. Proceed
to ADJUSTMENT PROCEDURES.

Clogged fuel filter Replace as required. Check cause.

Power valve stuck closed. Replace power valve.

Improper or obstructed main jets Replace carburetor.

Inoperative secondary system on Check shaft and plate alignment,
two staged carburetors binding linkage, service as required.

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

Carburetor feedback system Refer to COMPUTERIZED
ENGINE CONTROLS.