Sierra 18-3471 Yamaha 4-Stroke Water Pump Repair Kit w/HousingSierra replacement water pump repair kit for Yamaha 4-Stroke engines. Includes water pump housing. Fits: Late Model Four-Stroke 225-350 HP Yamaha Engines Direct Fit Replacement for OEM Water Pump Kit; Meets or Exceeds OEM Specifications; Interchangeable with: Yamaha Outboard; 6CE-W0078-01-00 (water pump kit) + 6CE-44311-01-00 (housing); Kit Contains: 18-3482 Water Pump Housing; 18-45617-1 Impeller; 18-7471 Outer O-Ring; 18-3459 Outer Wear Plate; 18-3457 Impeller Cup Insert; 18-3458 Water Pump Gasket; 18-2091 Oil Seal; 18-7483 O-Ring; 18-3302 Impeller Key; 18-0256 Bolt; Bolt Washer; Dowell Pin;