What is the main function of the fuel/water separator in the M1120?

Answer: C — Primary fuel filter/removes water before entering engine

The main function of the fuel/water separator in the M1120 is to act as the primary fuel filter and to remove water before the fuel enters the engine. This is critical because the presence of water in the fuel system can lead to engine performance issues, corrosion, or even severe damage to the engine components. The separator accomplishes this by allowing water, which is denser than fuel, to settle at the bottom of the separator. By ensuring that only clean, water-free fuel reaches the engine, the separator helps maintain optimal engine operation and longevity. While some components may relate to filtering or storage, their roles are not as central to the function as that of the fuel/water separator in preventing water and contaminants from entering the fuel system effectively. Hence, the correct answer highlights the separator's role in maintaining fuel quality, which is vital for engine health and performance.