YAMAHA 1/4" STAINLESS STEEL FUEL FILTER BASE ONLY Part # MAR-FLTHD-10-BK Superseded from Part # MAR-FLTHD-SS-12. Fuel contamination is one of the quickest ways to sabotage engine performance, and in a marine environment, water and debris in the fuel system can lead to serious issues. The Yamaha Stainless Steel 1/4" Fuel Water Separating Filter Head (MAR-FLTHD-10-BK) is built to handle the job, offering rugged durability and reliable filtration to keep your fuel clean and your engine running strong.. Built for Harsh Marine Conditions:. Heavy-Duty Stainless Steel - Resists rust, corrosion, and degradation, even in saltwater environments.. Standard 1/4" NPT Ports - Compatible with most marine fuel systems for easy installation and secure connections.. Optimized for Yamaha 10-Micron Filters - Works seamlessly with MAR-FUELF-IL-TR and MAR-10MEL-00-00 filters for superior protection.. Ideal For:. Yamaha outboards, ensuring clean fuel delivery and reduced maintenance issues.. Any boat needing