Water Pump Impeller Kit – Fits Yamaha 2-Stroke 40/50 HP (Replaces 6H4-W0078-00-00, 6H4-W0078-01-00, 18-3429, 18-3408) 330HP this kit is compatible with

this kit is compatible with MerCruiser Alpha One Gen II drives from serial number 0D469859 and up

Please verify against your existing part

Reinstall the exhaust elbow/riser

Reinstall the housing cover and tighten the bolts to the manufacturer's specified torque

Remove the screws holding the pump's front cover plate

Water Pump Impeller Kit – Fits Yamaha 2-Stroke 40/50 HP (Replaces 6H4-W0078-00-00, 6H4-W0078-01-00, 18-3429, 18-3408) 330HP this kit is compatible withProduct Details This Water Pump Impeller Kit Fits Yamaha 40 50 HP 2 Stroke (Replaces 6H4 W0078 00 00, 6H4 W0078 01 00) is engineered for Yamaha Marine 2 Stroke outboards, covering 40 HP models from 1984 to 1994 and various 50 HP models, including the Pro Series, manufactured between 1984 and 1996. It provides all necessary components for a complete water pump overhaul to restore engine cooling performance. This kit serves as a direct replacement for