The ROP Shop replacement Water Pump Kit for Sierra 18-3026 Drive Key, 18-7413 O-Ring, 18-4277 Boat Screw. Specs - Refer to images 2 & 3 for more information. Includes - (1) Impeller Assembly, (1) Impeller Housing Cup & Plate, (2) Impeller Housing Gaskets, (2) Grommets, (1) Drive Key, (1) O-Ring & (4) Screws; comes as shown in the first image. Kit contains all water pump parts except the impeller housing. New impeller cup inserts into old housing.
