Which component is crucial for the performance of inboard gasoline engines to prevent backfires?

The component that is crucial for the performance of inboard gasoline engines to prevent backfires is the carburetor backfire flame arrestor. This device is specifically designed to prevent flames from escaping the engine compartment in the event of a backfire. It works by cooling and extinguishing flames before they can exit the carburetor, thereby protecting both the engine and the surrounding area from potential fire hazards.

Inboard gasoline engines, due to their design and operation, can experience backfires, especially if there are issues with fuel mixture, timing, or airflow. The flame arrestor plays a vital role in ensuring safety by mitigating the risk associated with these backfires. Its installation is often required by safety regulations on powered vessels.

Other components mentioned, such as a fuel gauge, oil filter, and air compressor, play different roles in the operation and maintenance of the engine but do not directly contribute to preventing backfires. The fuel gauge helps monitor fuel levels, the oil filter is important for maintaining oil quality, and an air compressor may assist with various tasks but does not influence combustion safety directly in this context.