Explain the operating principles and maintenance of carburetors.

Explanation should include describing how a carburetor works (i.e., fuel is pumped to the carburetor, and it mixes the fuel with air) and how to diagnose common carburetor malfunctions, perform routine maintenance, and service the carburetor (e.g., adjustments, overhaul kit). 

Process/Skill Questions:

• What is involved in a carburetor overhaul?
• What determines the air-to-fuel ratio in a carburetor?
• How can the carburetor be adjusted?
• Why would adjustments need to be made?