The carburetor rotor in the M40 engine is a pivotal steel component responsible for controlling the flow of air passing through the carburetor and, subsequently, into the engine. Its precision engineering allows for smooth modulation of the air passage as the throttle arm is adjusted, regulating the engine’s speed and power output with precision. Crafted from steel, this robust rotor endures the mechanical stresses and temperature variations of engine operation, ensuring reliable and consistent performance. As a crucial part of the carburetor assembly, the steel rotor exemplifies the M40 engine’s commitment to precise control and efficient fuel-air mixture delivery, contributing significantly to the engine’s overall reliability and smooth operation.