For Yamaha 40 HP Water Pump Service Kit 725-412, 18-3374, 18-3397, 679-W0078-00

Water Pump Service Kit for Yamaha

This water pump service kit for Yamaha 40 HP outboard motors delivers a complete cooling system overhaul, replacing OEM part numbers 725-412, 18-3374, 18-3397, and 679-W0078-00.

Overview

This water pump service kit for Yamaha 40 HP engines contains all necessary parts for a full water pump service. A complete water pump service kit ensures the cooling system operates efficiently. This kit is intended for Yamaha 40 HP outboard motors.

Built For Performance

• Includes water pump impeller, gaskets, and seals for a comprehensive repair
• Replaces OEM part numbers 725-412, 18-3374, 18-3397, and 679-W0078-00
• Constructed with durable materials to withstand marine environments
• Ensures proper coolant flow for consistent engine temperature

Fits These Machines

• for Yamaha 40 HP outboard motors

On-The-Job Use

• Used during routine water pump replacement on Yamaha 40 HP outboards
• Restores cooling system performance in fresh and saltwater conditions
• Helps prevent engine overheating during extended operation
• Suitable for DIY mechanics and professional marine technicians

Specs At A Glance

Good To Know

Q: How often should a water pump service kit be replaced on a Yamaha 40 HP outboard? A: Typically every 3 to 5 seasons or as recommended by the manufacturer. Regular inspection of the impeller is advised to avoid overheating.

Q: Does this water pump service kit include all necessary gaskets? A: Yes, the kit includes the gaskets and seals required for a complete water pump rebuild. Confirm your specific engine serial number to ensure all components are compatible.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.