Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline. Sierra s 10 micron filters are over 90% efficient at removing particles as small as 10 microns. All filters flow @ 90 GPH to feed even the hungriest motor. Sierra 10 micron filters are recommended to prevent damage to sensitive inboard sterndrive and outboard fuel injection systems. Micron Rating: 10. Replaces: Yamaha - MAR-FUELF-IL-TR.