Yamaha - Water Pump Repair Kit - Cooling System - 6L2-W0078-00-00

Overview

On these mid-size two-stroke Yamahas, keeping the water pump in good shape is just part of staying ahead of bigger problems. Once water flow starts dropping off, it doesn’t take long before you’re dealing with overheating. This kit is the kind of service job I recommend doing before issues show up, not after. It’s a solid, complete refresh that gets the cooling system back to doing its job without guesswork.

Key Features

• Complete Pump Service Kit – Includes key components needed to restore proper cooling system performance.
• High-Quality Impeller – Provides strong and consistent water flow through the engine.
• Precision-Matched Components – Designed to work together for proper fit and reliable operation.
• Includes Seals and Hardware – Comes with O-ring, bolts, and key parts for a thorough rebuild.
• Durable Marine Construction – Built to handle constant exposure to water and harsh conditions.

Engine & Boat Compatibility

Designed for Yamaha two-stroke outboard engines, including 20 and 25 horsepower two-cylinder models. Commonly used on fishing boats, skiffs, and utility vessels. Always confirm part number compatibility before installation.

FAQ

Q: What are signs the water pump needs rebuilding?
A: Weak or no water stream, overheating, or inconsistent cooling are the biggest warning signs.

Q: How often should I service the water pump?
A: Typically once a season or every couple hundred hours, especially in saltwater use.

Q: Is this a full rebuild kit?
A: It covers the main wear components needed to restore pump performance during service.

Q: Do I need any special tools for installation?
A: Basic tools will handle it, but careful alignment during reassembly is important.

Q: Will this fix overheating issues?
A: If the problem is caused by worn pump components, this kit usually resolves it.