What system is used to regulate the carburetor's throttle position to protect the engine?

The governor system is essential for regulating the throttle position in an engine to ensure that it operates efficiently and safely. As the engine's load changes, the governor system automatically adjusts the throttle to maintain optimal performance. This mechanism is crucial because it prevents the engine from over-revving or stalling, which can lead to mechanical failure or damage.

The governor responds to various inputs, such as engine speed and load conditions, to modulate the amount of air and fuel entering the engine. By managing the throttle position, it helps maintain a balance between power output and fuel consumption, enhancing the engine's reliability and longevity.

In contrast, the fuel injection system primarily focuses on delivering the correct amount of fuel to the combustion chamber, while the throttle body controls airflow into the engine but does not inherently regulate the throttle position independently. The intake manifold facilitates the distribution of the air-fuel mixture but, like the throttle body, does not provide regulation. Therefore, the governor system is the most critical for protecting the engine by managing throttle position effectively.