Yamaha - Water Pump Repair Kit - Cooling System Service Kit - 6E5-W0078-A1-00

Overview

On older two-stroke Yamahas, the water pump is something you don’t gamble with. I’ve seen engines from this era run great for years just because the pump was serviced on time. This kit gives you everything you need to freshen it up and keep water moving like it should. Do it right, and you avoid overheating problems that can take a good motor down fast.

Key Features

• Complete Cooling System Kit – Includes all key components needed for a full water pump service.
• Strong Water Flow Restoration – Helps bring cooling performance back to proper operating levels.
• Two-Stroke Specific Components – Designed to match older Yamaha two-stroke pump systems.
• Durable Marine-Grade Materials – Built to handle heat, debris, and continuous water exposure.
• All-in-One Service Solution – Eliminates guesswork by providing matched parts for proper assembly.

Engine & Boat Compatibility

Designed for Yamaha two-stroke outboard engines requiring a water pump rebuild kit. Commonly used on models such as 15 horsepower, C115, and early 130 horsepower outboards. Suitable for freshwater and saltwater environments where reliable cooling system performance is critical.

FAQ

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

Q: How often should I replace the water pump on older two-strokes?
A: Typically once a year or every 100 hours, depending on usage.

Q: Any tips for installing this repair kit?
A: Make sure the impeller is installed in the correct rotation and lubricated during assembly.

Q: Why use a full kit instead of replacing just the impeller?
A: Replacing all components helps ensure proper sealing and long-term reliability.

Q: How does saltwater affect the water pump?
A: Salt and debris can wear parts faster, so regular flushing and maintenance are important.

• Supersessions
  6E5-W0078-01-00, 6E5-W0078-00-00