Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH to feed even the hungriest motor. Recommended to prevent damage to sensitive inboard and outboard fuel injection systems. Type-1/4" Aluminum, Replaces-Mercury 89876A3, Yamaha MAR-FLTHD-AL-12 -Sierra