Air Valve Spring
- Loosen shaft lock screw using Allen wrench. Rotate spring fulcrum pin counterclockwise until throttle valves open. See Fig 1 .
- Rotate spring fulcrum pin clockwise until throttle valves close. Then rotate spring fulcrum pin proper amount of revolutions. See E4MC CARBURETOR SPECIFICATIONS table.
- Hold spring fulcrum pin and tighten lock screw. Apply a light coat of grease to spring contact area.