Kohler COMMAND CV17-745 Service Manual page 39

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
Main Circuit: (See Figure 5-3) 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.
Fuel Inlet
Float Valve Seat
Float Valve
Main Jet
Accelerator Pump Nozzle
Figure 5-3. Main Circuit.
Main Emulsion
Hole
Main Air Bleed Jet
Choke Valve
Bowl Vent
Check Valve Spring
Leak Jet
Outlet Check Valve
Adjustment Screw
Diaphragm Spring
Pump Diaphragm
Inlet Check Valve
ACCELERATOR PUMP
(Some Carburetors)
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Fuel System and Governor
Idle Speed
(RPM)
Adjustment
Screw
Float
ASSEMBLY
Section 5
Air
Fuel
Mixture
Throttle Valve
Main Nozzle
Main Jet
Fuel Shut-Off Solenoid
with Main Jet
5.5