Rotary carburetor

A rotary throttle valve carburetor comprising:

• a throttle valve having a throttle hole, the throttle valve is configured to rotate about an axis to control an airflow and fuel flow rate;
• a metering needle disposed perpendicularly to an air intake passage of a carburetor main unit, wherein the metering needle is inserted into the throttle hole;
• a fuel nozzle connected to a fixed fuel chamber, wherein the fixed fuel chamber is in fluidic communication with to the throttle hole;
• a starting mechanism comprising a throttle valve lever, an operating cam, and an adjusting screw, wherein the throttle valve lever is coupled to the rotary throttle valve and is configured to rotate the throttle valve into a first state with increased airflow for cold starting, wherein the operating cam is configured to push the throttle valve lever upward and hold the throttle valve lever in the first state using an engaging protrusion, wherein adjusting screw is configured to adjust a depth of the metering needle being inserted into the throttle hole by adjusting a position of the throttle valve lever, wherein the operating cam is configured to actuate in linear motion and is constantly biased in a direction toward the throttle valve lever by a biasing member, wherein the throttle valve lever configured to rotate to release the throttle valve lever from the first state to a second state where the operating cam is actuated away from the throttle valve lever to move the throttle valve and the metering needle toward the fuel nozzle.