Sierra 18-7789 Fuel Water Separating Filter, 21 Micron

Sierra 18-7789 is a 21 micron spin-on fuel water separating filter for gasoline marine engines. It cross-references to OMC 502906 and Volvo Penta 3851218-2 and 3852413 among other numbers.

Sierra 18-7789 Fuel Water Separating Filter, 21 Micron is listed in the Laken Water Sports marine parts catalog for online ordering and Phoenix-area pickup. Confirm fitment, availability, and pickup timing with the parts team before ordering when compatibility is critical.

Fitment notes: Confirm Sierra 18-7789, thread/filter base compatibility, and OEM cross-reference before ordering.