Mercury - Water Separating Fuel Filter Marine Filtration Series High-Efficiency Element 8M0154763. Overview. When you spend real time on the water, you learn quickly that it's often the smallest parts that make the biggest difference. Fuel is the lifeblood of your engine, and when water sneaks into the system, things can go south fast. That's why a dependable fuel filter feels less like a maintenance item and more like a quiet guardian sitting between you and an unexpected breakdown. The Quicksi