What does a carburetor backfire flame arrestor do?

A carburetor backfire flame arrestor is designed specifically to prevent explosions on inboard gasoline engines by containing and suppressing any flames that may occur during backfiring events. When an engine backfires, it can ignite fuel vapors in the carburetor or intake manifold, leading to dangerous situations and potential explosions. The flame arrestor acts as a safety device by providing a barrier that cools and extinguishes the flames before they can escape, thereby protecting both the vessel and its occupants from harm.

While improved engine performance, enhanced fuel efficiency, and acting as a fuel filter are important aspects of engine operation and maintenance, they are not the primary functions of a flame arrestor. The core purpose of the arrestor is to enhance safety, which is why this answer is the most accurate in the context of its essential role in marine environments.