What is the purpose of a carburetor-economizer system?

• A. Provides additional fuel at high power settings for cooling to prevent detonation.
• B. Reduces fuel above certain power.
• C. Improves idle stability.
• D. Increases air flow at altitude.

Answer: (A)

The main idea is that the carburetor-economizer system adds extra fuel when the engine is operated at high power to cool the engine and prevent detonation. When you push the throttle toward high power, the risk of knocking increases because temperatures and pressures rise. By enriching the mixture with additional fuel, more fuel evaporates inside the cylinders, which absorbs heat and lowers peak temperatures. This cooling helps prevent detonation during heavy power demands. It isn’t about improving idle stability, increasing air flow, or reducing fuel at high power; it’s specifically about providing extra fuel for cooling at high power to keep the engine safe from detonation.