Inline fuel filter 8M0176313 is for on-engine installation on 175-300hp 3.4L V6 and 4.6L V8 4-stroke outboards (serial No. 2B529482 & above). Replace the filter once each season, every 100 engine operating hours and/or as your owner's manual recommends based on engine use. The 10 micron fuel filter removes contaminants, particles and water from your fuel. Prevents harmful debris that may be in the gasoline fuel tank from getting to the engine to rob it of power and efficiency. See your owner's manual or service manual for more information.