Yamaha - Water Pump Repair Kit - Cooling System Component - 689-W0078-A6-00

Overview

Water pump kits are one of those maintenance items you don’t skip if you want your motor to last. When the impeller starts to wear, cooling drops off fast, and that’s when you get into trouble. I’ve rebuilt a lot of these smaller Yamaha units, and having everything in one kit makes the job go a lot smoother. This setup gives you all the core pieces to get water flow back where it should be.

Key Features

• Complete Pump Rebuild Kit – Includes essential components needed to restore proper cooling system function.
• Genuine Yamaha Components – Designed to match factory specifications for reliable fit and performance.
• Efficient Water Flow Restoration – Helps maintain proper engine temperature under load.
• Durable Impeller Design – Built to handle continuous rotation and resist wear in marine use.
• All-in-One Service Solution – Reduces downtime by providing everything needed for a full pump service.

Engine & Boat Compatibility

C25 – 1990 to 1997
C30 – 1990 to 1992

FAQ

Q: What are signs the water pump needs rebuilding?
A: Weak water stream, overheating, or inconsistent cooling are the main signs.

Q: How often should I replace the impeller?
A: Typically every season or every 100 hours, depending on use.

Q: Is this a full rebuild or just an impeller kit?
A: This is a full repair kit with housing and internal components included.

Q: Can I install this myself?
A: Yes, if you’re comfortable dropping the lower unit and reassembling the pump.

Q: Does saltwater use affect pump life?
A: Definitely—saltwater can accelerate wear, so regular maintenance is key.

• Supersessions
  689-W0078-06-00, 689-W0078-05-00