Includes: Oil Filter , Anode , Impeller Kit , and Spark Plugs Many boats have a fuel / water separating filter prior to the Generator unit, and the inline filter will not require service as often. Replaces: Spark Plugs NGK (2) BPR4ES , Oil Filter: Kohler 359771 , Sierra 23-7821 .. Anode: Kohler 260085 , Sierra 23-6400 .. Impeller Kit: Kohler 359978 , Sierra 23-3314 Fits Kohler Models: 4EF , 5E , 6EF , 7.3E Convenient Maintenance Kit. Many boats have a fuel / water separating filter prior to the Generator unit, and the inline filter will not require service as often. Includes: Oil Filter , Anode , Spark Plugs , and Impeller Kit. Brand may be Sierra , Napa , NGK or Aftermarket. Fits Kohler Marine Gasoline Generator Models: 4EF , 5E , 6EF , 7.3E Does not fit Diesel Generators. Replaces: Oil Filter: Kohler 359771 , Sierra 23-7821 Anode: Kohler 260085 , 267928 , Sierra 23-6400 Impeller Kit: Kohler 359978 , Sierra 23-3314 Spark Plug: NGK BPR4ES 6 blade impeller ; Width: 3/4" (19mm) Diameter: 1-9/16" (39.7mm) ; Shaft 7/16" Drive D Slot ; For engine cooling