Protect injectors and sensitive engine parts by keep fuel free of debris Water and contaminates can damage engine parts and reduce performance and efficiency. Changing fuel filters at regular intervals maximizes performance. Replacing filter elements with original mercury filters ensure the task will be quick and function will be restored to factory specifications. We recommend having spare filters to restore funtion in the event of a clog. Key Features Original factory parts ensure fit and function Inline filters available in common fuel line sizes Filter kits come complete with gaskets Compatible with ethanol blended fuels (E10) Applications Inline filters fit: 1/4" or 5/16" fuel lines 1661727 Fuel Pump Cartridge: Inline 4 and 6 cylinder engines with AC fuel pumps 1661800 Carburetor Cartridge: MerCruiser 224 CID engines5037338 Fuel/water separator: 2.5L, 3.0L, 3.7L, 3.8, and 4.3L engines