Engineered Marine Products 47-47271 Water Pump Impeller for Mercury Mariner Outboards Impellers - 6-Blade

The Engineered Marine Products (EMP) 47-47271 is a replacement water pump impeller designed for Mercury and Mariner 2-cylinder outboard engines. Built to meet or exceed OEM specifications, this impeller ensures reliable coolant circulation to keep your outboard engine operating at the correct temperature.

Key Specifications:

• Number of Blades: 6
• Inner Diameter (ID): 16 mm
• Outer Diameter (OD): 38.5 mm
• Width: 21.8 mm
• Hub Type: Keyed (hub uses key)

Key Features:

• Manufactured to demanding industry standards for a well-balanced, precision fit
• Constructed from durable rubber compound for long service life, even with frequent use
• Keyed hub design ensures secure, positive engagement with the pump shaft
• Direct OEM-style replacement for straightforward installation
• Engineered to perform reliably in both freshwater and saltwater environments

Brand Background: For over 40 years, EMP has been serving the OEM and marine aftermarket by providing superior quality, reliable marine products. EMP products are engineered to meet or exceed original equipment manufacturer specifications.

Regular impeller replacement is a critical part of outboard engine maintenance. Impeller blades can degrade over time — especially in saltwater — and prolonged storage without use can cause blades to set or stick, reducing pump efficiency and risking engine overheating. Replacing the impeller on schedule protects your engine and cooling system investment.