Sierra 118-3440 Water Pump Repair Kit for Yamaha Outboard

The Sierra 118-3440 Water Pump Repair Kit is designed specifically for Yamaha 4-stroke outboard engines. This comprehensive repair kit provides all the essential components needed to service and maintain your outboard's cooling system, ensuring optimal temperature regulation and preventing costly engine overheating.

Key Features:

• Manufactured from high-quality rubber compounds, stainless steel, and composite plastics for superior durability in harsh marine environments
• Engineered to meet or exceed OEM specifications for reliable performance
• Direct replacement for Yamaha OEM part number 66T-W0078-00-00 (without housing)
• Cross-references with Mallory 9-48610
• Includes impeller and all necessary gaskets and seals for complete water pump service

Regular water pump maintenance is critical for marine engines. Impellers can lose elasticity when left idle or exposed to extreme temperatures, compromising coolant circulation and leading to engine damage. Sierra recommends servicing your water pump every 100 hours of operation or at least once annually to maintain peak performance and avoid downtime.