If the fuel filter becomes restricted, what will happen to the engine?

When a fuel filter becomes restricted, it limits the flow of fuel to the engine. This reduction in fuel supply can lead to a condition called "flame out." In this scenario, the engine may not receive enough fuel to maintain combustion, which is critical for the continuous operation of the engine. If the fuel flow drops below a certain threshold, combustion can cease altogether, leading to incomplete combustion and ultimately causing the engine to shut down.

This explanation highlights the importance of proper fuel flow, as a restricted fuel filter directly impacts the engine's ability to function effectively by depriving it of the necessary fuel for operation.