Sierra International 18-3429 Water Pump Repair Kit - Yamaha Sierra Water Pump Kit Contains: 18-0256 Bolt, 18-0292 Wear Plate, 18-0294 Wear Plate, 18-3068 Impeller, 18-3435 Insert Cup, 18-3436 Wear Plate Sierra part number: 18-3429 Interchangeable with the following: Yamaha 6H1-W0078-00-00, 6H4-W0078-A0-00, 6H4-W0078-01-00