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 which can lead to oil

which can lead to oil leaks and water intrusion

Reinstall the exhaust elbow/riser

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

Includes all essential components for a complete overhaul

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 which can lead to oilProduct 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