Initial Adjustment

Completely close (turn clockwise) both adjusting

Fuel inlet screen Main fuel supply channel

Inlet needle and seat Float valve plug screw Float

Throttle disc Idle mixture discharge ports Idle mixture channel Bowl air vent Idle tube and plug Idle tube fuel orifice Idle tube gasket Idle adjustment screw Idle air bleed channels. Choke disc Venturi Bowl gasket Main nozzle adjusting screw Main nozzle air bleed tube

Fuel bowl drain screw Main nozzle orifice Main nozzle channel plug Main nozzle Main nozzle sump

Revised: 5-68

Figure 3F-12. MD Carburetor Cross Section

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