Kohler Command CV730 User Manual download pdf (Page 40)

5.6

Section 5

Fuel System and Governor

Figure 5-4. Main Circuit.

Check Valve Spring

Outlet Check Valve

Leak Jet

Adjustment Screw

Diaphragm Spring

Pump Diaphragm

Inlet Check Valve

ACCELERATOR PUMP

ASSEMBLY

(Some Carburetors)

Fuel Shut-Off Solenoid

with Main Jet

Main Jet

Main Nozzle

Throttle Valve

Choke Valve

Main Air Bleed Jet

Accelerator Pump Nozzle

Bowl Vent

Fuel Inlet

Float Valve Seat

Float Valve

Main Jet

Float

Main Emulsion

Hole

Idle Speed

(RPM)

Adjustment

Screw

Air

Fuel

Mixture

Main Circuit: (See Figure 5-4) At high speeds/loads the engine operates on the main circuit. As a metered

amount of air is drawn through the main air bleed jet, fuel is drawn through the main jet. The air and fuel are

mixed in the main nozzle and then enter the main body of airflow, where further mixing of the fuel and air takes

place. This mixture is then delivered to the combustion chamber. The carburetor has a fixed main circuit; no

adjustment is possible.

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Kohler Command CV730 User Manual Page 40