Mercury - Water Separating Fuel Filter Kit For 1992 MerCruiser 4.3L Gen II Engines 807172A1. Overview. Clean fuel is the lifeblood of your engine, and the Mercury Marine 807172A1 Water Separating Fuel Filter Kit keeps it that way. Designed for 1992 MerCruiser 4.3L Gen II gasoline sterndrive and inboard engines, this kit removes water and debris from your fuel before it ever reaches your carburetor or injectors. It's a complete, ready-to-install system - including the mounting bracket, vessel mou