Under what circumstances does a carburetor need to be replaced?

[Scarlett]

Black smoke from the exhaust pipe, unstable idling, or poor throttle response with rough transitions may indicate the need for carburetor replacement or cleaning. Below is some information about automotive carburetors: 1. Working Principle: A carburetor is a mechanical device that mixes a specific ratio of gasoline and air under the vacuum created by the engine's operation. As a precision mechanical device, it utilizes the kinetic energy of the incoming airflow to atomize the gasoline. 2. Function: The carburetor plays a vital role in the engine and can be referred to as the 'heart' of the engine. A complete carburetor assembly should include a starting device, idling device, medium-load device, full-load device, and acceleration device. The carburetor automatically adjusts the mixture concentration and outputs the corresponding amount of air-fuel mixture according to the engine's varying operational demands.