Water Pump Impeller for Mercury 6 8 209CC 9.8 9.9 HP Outboard 47-8037481 500344

Water Pump Impeller for Mercury

This water pump impeller for Mercury outboard engines circulates coolant through the powerhead to prevent overheating, and serves as a direct replacement for OEM numbers 47-8037481 and 500344.

Overview

The water pump impeller for Mercury is a critical component in the cooling system of small outboard motors, ensuring efficient water flow to keep the engine at safe operating temperatures. Designed for Mercury 6, 8, 9.8, and 9.9 HP models with a 209CC displacement, this impeller delivers reliable performance and easy installation. Regular replacement of the water pump impeller for Mercury is essential to avoid engine damage from overheating.

Built For Performance

• Precision-molded rubber construction for flexible, tight sealing against the pump housing
• Corrosion-resistant materials withstand continuous saltwater exposure
• Exact OEM dimensions ensure a drop-in fit without modifications
• Reinforced hub design maintains consistent pumping pressure at all RPMs
• Tested for durability over extended service intervals

Fits These Machines

• for Mercury 6 HP outboard
• for Mercury 8 HP outboard
• for Mercury 9.8 HP outboard
• for Mercury 9.9 HP outboard

On-The-Job Use

• Replacement during routine water pump service on small fishing boats
• Restores cooling efficiency on aging Mercury outboards
• Used in both freshwater lakes and saltwater bays
• Essential for preventing exhaust manifold warping

Specs At A Glance

Good To Know

Q: How often should the water pump impeller for Mercury be replaced? A: Most manufacturers recommend replacement every 100-300 hours or annually, whichever comes first. Check the impeller for cracks or wear during each oil change.

Q: Can I replace this water pump impeller for Mercury myself? A: Yes, with basic mechanical skills and a service manual. Ensure the engine is in neutral and the cooling system is drained before starting.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.