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

The Sierra 18-3007 is a premium aftermarket water pump impeller designed as a direct replacement for Mercury and Mariner outboard engines ranging from 30 to 70 horsepower. This critical cooling system component ensures proper water circulation through your marine engine, preventing overheating and maintaining optimal performance.

Key Features:

• Engineered to meet or exceed OEM specifications for reliable performance
• Constructed with durable neoprene material and brass hub for long service life
• Direct replacement for Mercury OEM part numbers 47-89983, 47-89983T, 47-65959, and 47-20268
• Also replaces Mallory 9-45300, GLM 89830, and MerCruiser 47-20268
• Designed to withstand harsh marine environments
• Precision-engineered for exact fitment and optimal water flow

Sierra Marine is a trusted name in aftermarket marine parts, offering premium-quality replacements backed by extensive quality control. This impeller is manufactured to provide maximum durability and reliable performance for Mercury and Mariner outboard motors. Regular impeller replacement is essential for maintaining your engine's cooling system—most manufacturers recommend annual replacement or every 100 hours of operation, whichever comes first.