Mercury - Water Separating Fuel Filter Quicksilver Series Steel Construction 8M0154758. Overview. There's a certain comfort that comes from knowing the fuel moving through your engine is as clean as it should be. When you're pushing offshore at sunrise or easing back toward the dock with tired arms and a cooler full of fish, you want every part on board pulling its weight. This Mercury Marine part gives you that quiet confidence-the kind you only appreciate once you've spent enough time on the w