Sierra International 18-3428-1 Water Pump Kit Without Housing Sierra Water Pump Kit Meets or exceeds the original equipment quality Sierra part number: 18-3428-1 Interchangeable with the following: Yamaha 6H3-W0078-A0-00, 6H3-W0078-00-00 Contains: 18-0240 Water Pump Gasket, (2) 18-0256 Bolt, 18-0756-1 Water Pump Gasket, 18-0757 Outer Plate Gasket, 18-3069 Impeller, 18-7436 O-Ring