Yamaha C40 Water Pump Repair Kit 679-W0078-A1-00

Overview

On these mid-range Yamaha two-strokes, the water pump is one of those things you don’t wait on. If cooling drops off, it can turn into a bigger problem fast. This kit gives you everything you need to freshen up the pump in one go, instead of chasing parts one by one. It’s a solid move during regular service to keep the engine running cool and reliable.

Key Features

• Complete Water Pump Kit – Includes all major components needed for a full pump rebuild.
• Cooling System Restoration – Helps maintain proper water flow to protect engine temperature.
• OEM Matched Components – Designed to fit and function with Yamaha cooling systems.
• All-in-One Service Solution – Reduces downtime by replacing multiple wear items at once.

Engine & Boat Compatibility

Compatible with Yamaha C40 two stroke outboards.

FAQ

Q: What are signs the water pump needs to be rebuilt?
A: Weak water stream, overheating, or inconsistent cooling are common signs.

Q: How often should I replace the water pump components?
A: It’s typically recommended every season or every 100 hours, depending on use.

Q: Does this kit include everything needed for installation?
A: Yes, it includes key components like the impeller, gaskets, seals, and hardware.

Q: Is this important for saltwater use?
A: Yes, saltwater can wear down pump components faster, so regular service is important.

Q: Any tips before installing this kit?
A: Inspect the housing for wear and make sure all surfaces are clean before reassembly.

• Supersessions
  679-W0078-A0-00, 679-W0078-01-00, 679-W0078-00-00