Water Pump Impeller Kit – Fits Yamaha F50A 4-Stroke (Replaces Yamaha 6BG-W0078-01-00, Sierra 18-3434) 3.6HP Assembly includes the required O-rings

Assembly includes the required O-rings and seals for installation

Includes a new impeller and essential replacement components for a full repair

this carburetor may not be the correct fit

the Woodruff key (664-44338-00-00) is critical

Visually comparing the old pump to our product photos can also help confirm fitment

Water Pump Impeller Kit – Fits Yamaha F50A 4-Stroke (Replaces Yamaha 6BG-W0078-01-00, Sierra 18-3434) 3.6HP Assembly includes the required O-ringsProduct Details This Water Pump Impeller Kit provides a complete solution for servicing the water pump on Yamaha 4 stroke 4050 HP outboards, including models F40, F50A (19912007), F30LA, and F40LA. It is designed to restore cooling system performance and prevent engine overheating. It serves as a direct replacement for Yamaha part numbers 6BG W0078 01 00 and 6BG W0078 00 00, as well as aftermarket equivalents Sierra 18 3434, JLM YHJB 6BG, and