Mercury - Quicksilver Water-Separating Fuel Filter Fuel System Component 75HP 2-Stroke 4-Cylinder Outboards 73532. Overview. Clean fuel keeps your outboard performing the way it should. The Mercury Marine 73532 Quicksilver Water-Separating Fuel Filter protects your engine by removing moisture, dirt, and other contaminants before they reach the carburetor. Designed for Mercury 75HP 2-stroke 4-cylinder outboards (1984-1988) and 80HP 4-cylinder models (1980-1983), this OEM filter uses stainless-ste