Which statement about main fuel strainers is true?

• A. They collect water and sediment and keep foreign matter out of carburetor
• B. They filter air
• C. They regulate ignition timing
• D. They lubricate the fuel system

Answer: (A)

Fuel strainers sit in the fuel line ahead of the carburetor to protect the metering system by catching debris and separating water from the fuel. The main purpose is to collect water and sediment and keep foreign matter out of the carburetor, preventing clogging of jets and passages and reducing corrosion from water contamination. This is essential for stable fuel delivery and smooth operation. The other statements don’t fit because filtering air is the job of an air filter, ignition timing is set by the ignition system, and lubrication isn’t the function of a strainer in the fuel path.