Yamaha - Water Pump Repair Kit - Cooling System Service - 40 50 P50 - 63D-W0078-00-00

Overview

If you’re running an older Yamaha two-stroke, keeping the cooling system in check is non-negotiable. This water pump repair kit gives you everything needed to bring the pump back to proper working condition without piecing parts together. It’s a straightforward refresh that helps restore water flow and keeps engine temps where they should be. Whether you're running hard or just idling through the channel, it’s the kind of maintenance that keeps things dependable.

Key Features

• Complete Pump Service Kit – Includes all core components needed to rebuild the water pump.
• Restores Water Flow – Helps bring back strong cooling performance and steady tell-tale output.
• OEM Yamaha Components – Designed to match factory specs for proper fit and sealing.
• Ideal for Two-Stroke Maintenance – A smart upgrade when servicing older Yamaha outboards.

Engine & Boat Compatibility

• 40 - All Models
• 50 - All Models
• P50 - 1996 & older

FAQ

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

Q: Is this kit enough for a full rebuild?
A: Yes, it includes the main wear components needed to restore proper pump operation.

Q: How often should I service the water pump?
A: Typically once a season or every 100 hours, depending on usage and conditions.

Q: Does running in debris-heavy water affect pump life?
A: Yes, sand and debris can wear out internal parts faster, requiring more frequent service.

Q: Is this difficult to install?
A: It’s manageable if you’re comfortable removing the lower unit and following proper torque specs.

• Engine Application
  • 40 - All Models
  • 50 - All Models
  • P50 - 1996 & older