The Sierra 18-3415 water pump repair kit with housing is a complete cooling system service kit designed for selected Yamaha 40HP, 50HP and 60HP outboard engines. Replacing Yamaha 63D-W0078-03, 63D-W0078-01-00 and water pump housing 63D-44311-00-00, this comprehensive kit includes the key components required to restore water pump performance and maintain proper engine cooling.
Regular water pump servicing helps protect your outboard from overheating and cooling system failure. The Sierra 18-3415 kit includes a new water pump housing, impeller, wear components, seals and hardware, making it an ideal solution for complete water pump maintenance.
The Sierra 18-3415 is the complete version of this water pump service kit and includes a replacement water pump housing. If your existing housing is in good condition and does not require replacement, the more economical alternative is the Sierra 18-3434 Water Pump Repair Kit, which services the same Yamaha application without the housing.
Key replacement components included in this kit are also available separately, including Sierra 18-3069 impeller, Sierra 18-3449 insert cup, Sierra 18-3305 impeller key, Sierra 18-3186 impeller plate and Sierra 18-1830 water seal damper. Replacing worn water pump components during routine servicing helps maintain proper cooling water flow and reduce the risk of engine overheating.
Suitable for selected Yamaha outboard engines using Yamaha water pump kit 63D-W0078-03 and 63D-W0078-01-00. Always confirm your existing part numbers and engine application before ordering.
What Yamaha part numbers does this kit replace?
This kit replaces Yamaha 63D-W0078-03, Yamaha 63D-W0078-01-00 and includes the equivalent of housing 63D-44311-00-00.
Does this kit include the water pump housing?
Yes. Sierra 18-3415 includes a replacement water pump housing and is the complete version of the Sierra 18-3434 repair kit.
What is the difference between Sierra 18-3415 and Sierra 18-3434?
The Sierra 18-3415 Water Pump Kit with Housing includes a replacement water pump housing. The Sierra 18-3434 Water Pump Repair Kit services the same Yamaha application but does not include the housing.
Which impeller is included in the Sierra 18-3415 kit?
The Sierra 18-3415 includes Sierra 18-3069 impeller along with the associated wear components and seals required for a complete water pump service.
Why should I replace my water pump kit?
Routine replacement of water pump components helps maintain proper cooling water flow and reduces the risk of engine overheating and cooling system damage.
The Sierra 18-3415 water pump repair kit provides a complete cooling system service solution, helping maintain reliable engine temperatures and long-term outboard performance.
Australian Dollars
