Patent ID: 6123322
Filing Date: 2000-09-26
Classification: F02M,Y10S

Abstract:
A carburetor for delivering a metered fuel and air mixture to an engine comprising:a main body;a mixing passage formed through the main body;a throttle valve carried by the main body and constructed to control the fluid flow through the mixing passage, the throttle valve being movable in the mixing passage between first and second positions;an idle speed adjustment screw carried by the main body and adjustable to control the idle position of the throttle valve;an idle nozzle carried by the main body in communication with the mixing passage and having a restricted fixed orifice constructed to supply a metered quantity of fuel to the engine at least when the engine is operating at low speeds;a main nozzle carried by the main body in communication with the mixing passage and having a restricted fixed orifice constructed to supply a metered quantity of fuel to the engine at least when the engine is operating at high speeds; and the quantity of fuel supplied to the idle and main nozzles is not adjustable and cannot be changed by the user to change the fuel to air ratio of the fuel and air mixture supplied to an engine by the carburetor; whereby the fixed orifices of the idle nozzle an main nozzle control the flow rate of fuel into the mixing passage in response to air flow through the mixing passage to provide a metered fuel and air mixture to the engine.