Yamaha - Water Pump Repair Kit - Cooling System Service Kit - 25 & 30 - 6J8-W0078-A2-00

Overview

The Yamaha Water Pump Repair Kit | 6J8-W0078-A2-00 is one of those kits you grab when you want to refresh the entire cooling system instead of just swapping one part. On 2-stroke motors, once the pump starts wearing out, you’ll usually notice weaker water flow or temps creeping up. This kit gives you the main components to bring the pump back to full performance in one go. If you’re doing maintenance or fixing cooling issues, this is a smart, complete solution.

Key Features

• Complete Pump Service Kit – Includes key components needed to rebuild and restore water pump performance.

• OEM Fit Precision – Built to Yamaha specifications for proper alignment and reliable operation.

• Restores Cooling Performance – Helps bring back strong water flow and proper engine temperature control.

• Durable Marine Components – Designed to handle heat, friction, and long-term marine use.

Engine & Boat Compatibility

• 25 Present
• 30 1996-2002

FAQs

Q1: When should I replace the full water pump instead of just the impeller?
A: If gaskets, plates, or internal parts show wear, replacing everything together is the better move.

Q2: What are signs the water pump needs servicing?
A: Weak telltale stream, overheating, or inconsistent cooling are common indicators.

Q3: Does this kit include everything needed?
A: Yes, it includes the main components required to rebuild the pump assembly.

Q4: Is this routine maintenance?
A: Yes, especially on 2-stroke engines where cooling system wear is common over time.

Q5: Is installation difficult?
A: It requires removing the lower unit, but it’s a standard job for most outboards.

• Engine Application
  • 25 - Present
  • 30 - 1996 to 2002