Cooling System | Yamaha Outboard

Fits Yamaha 50, 60 & 70HP Outboards Using 6H3 Water Pump System

Designed for Yamaha outboards using the 6H3-series water pump repair kit. The 3428 Impeller Repair Kit replaces Yamaha OEM kit numbers in the 6H3-W0078 series and is used to service the water pump assembly across multiple Yamaha 2-stroke and select later model platforms.

Compatibility

This impeller repair kit fits a range of Yamaha 50HP, 60HP, and 70HP outboards that use the 6H3-series water pump system. OEM diagrams show this kit used across multiple model designations and year ranges.

Application Chart

This kit fits engines using the 6H3-series water pump assembly. Always confirm using your engine model and OEM part number before ordering.

Part Numbers & Cross References

What This Kit Is Used For

This impeller repair kit is used to service the water pump assembly and maintain proper engine cooling. The impeller circulates water through the engine to regulate operating temperature.

Over time, impellers wear, harden, or lose efficiency. Replacing the repair kit components helps restore water flow and protect the engine from overheating.

Frequently Asked Questions

What engines does this kit fit?
This kit fits Yamaha 50, 60, and 70HP outboards that use the 6H3-series water pump system.

Does this fit both 2-stroke and 4-stroke engines?
Primarily 2-stroke models, with select later 4-stroke T50/T60 applications that use the same water pump design.

What OEM numbers does this replace?
It replaces Yamaha 6H3-W0078-A0-00, 6H3-W0078-00-00, 6H3-W0078-01-00, and 6H3-W0078-02-00.

When should this be replaced?
Typically during routine maintenance or if cooling performance decreases.

Searchable Part Numbers

Part Number: 3428
Cross Reference #: 6H3-W0078-A0-00, 6H3-W0078-00-00, 6H3-W0078-01-00, 6H3-W0078-02-00, 18-3428, 18-3428-1
Common Searches: Yamaha 60 impeller kit, Yamaha 70 impeller, Yamaha 50 impeller, 6H3 water pump kit