Mercury – Water Separating and Sensing Fuel Filter Kit | Fuel Protection Series | Metal & Composite Assembly | 8M0157708Mercury Water Separating and Sensing Fuel Filter Kit Fuel Protection Series Metal & Composite Assembly 8M0157708 Overview If youve spent enough time on the water, you already know how unpredictable fuel can be. Some days its clean and fresh; other days you can almost feel the engine hesitate, like its second guessing what just ran through the lines. Thats why a dependable filtration system matters so much and why this Mercury Marine part earns a spot