Sierra 18-79911 Fuel Water Separator FilterThe Sierra Fuel Water Separator Filter is a replacement filter for Mercury and Mercruiser engines. This high performance fuel/water separator filter is over 90% effective at removing particles as small as 10 micron. It features an internal epoxy coating that protects against corrosion. A low pressure drop reduces fuel flow restriction which helps prevent vapor-locking and stalling. 90 GPH / 10 Micron Filtration; Length: 8.5"; Interchangeable with: Mercury Marine; 35-8M0079962;