Sierra 18-3007 Water Pump Impeller for Mercury/Mariner Outboards

The Sierra 18-3007 is a high-quality replacement water pump impeller designed for Mercury and Mariner outboard motors ranging from 30 to 70 horsepower. This essential cooling system component ensures optimal water flow through your engine's cooling system, preventing overheating and maintaining peak performance.

Key Features:

• Direct replacement for Mercury OEM part numbers 47-89983, 47-89983T, 47-65959, and 47-20268
• Manufactured to meet or exceed original equipment specifications
• Durable construction designed to withstand harsh marine environments
• Compatible with various Mercury/Mariner outboard models from 30-70 HP
• Interchangeable with GLM 89830, Mallory 9-45300, and Mercruiser 47-20268

Sierra marine impellers are engineered for maximum durability and long service life in demanding saltwater and freshwater applications. Regular impeller replacement is critical for maintaining your engine's cooling system—marine professionals recommend changing impellers annually or every 100 hours of operation to ensure reliable performance and prevent costly engine damage.