Sierra 18-3471 Water Pump Repair Kit with Housing for Yamaha Outboards

The Sierra 18-3471 is a comprehensive water pump repair kit designed as an OE replacement for late model four-stroke Yamaha outboard engines ranging from 225 to 350 horsepower. This complete kit provides all the components needed to rebuild your engine's water pump system and restore proper cooling performance.

Complete Kit Includes:

• Water pump housing for structural integrity
• Impeller with impeller key for precise installation
• Impeller cup insert for proper impeller seating
• Outer wear plate to protect against abrasion
• Gasket for reliable sealing
• Oil seal to prevent lubricant contamination
• Outer O-ring, inner O-ring, and washer for leak-free operation
• Mounting bolts, pin, and dowel for secure assembly

This kit eliminates the need to source individual components separately, ensuring you have everything required for a complete water pump rebuild. Designed specifically for compatibility with late model four-stroke Yamaha engines from 225 HP to 350 HP, this repair kit meets OEM specifications for reliable performance and proper engine cooling.