Sierra International 18-3311 Water Pump Kit with Housing & Cup Sierra Water Pump Kit with Housing &amp; Cup Meets or exceeds the original equipment quality Sierra part number: 18-3311 Interchangeable with the following: Mallory 9-48614, Yamaha 6G5-W0078-A1-00, 6G5-W0078-00-00, 6G5-W0078-01-00