Sierra 18-3310 Water Pump Kit without Housing Sierra Water Pump Kit without Housing Meets or exceeds the original equipment quality Sierra part number: 18-3310 Interchangeable with the following: Mallory 9-48601, Yamaha 6G5-W0078-01-00, 6G5-W0078-A1-00, 6G5-W0078-00-00 Fit specific, check part numbers to ensure proper fit