Mechanical Power Valve

Fig. 9, Power Valve Adjustment:

Remove bowl vent cover plate. Hold throttle in wide open position. Insert a 5/64 inch Allen wrench in mechanical power valve adjustment screw, Fig. 9. Push screw downward and release to determine if clearance exists. Turn screw clockwise until zero clearance is obtained. Adjust by turning screw one turn counterclockwise. Install the bowl vent cover plate.