Quicksilver 8M0139978 Impeller Housing Assembly for MerCruiser Marine Engines

The Quicksilver 8M0139978 Impeller Housing Assembly is a genuine OEM replacement component designed for MerCruiser marine engine cooling systems. This impeller housing fits 4.5 and 6.2L MPI sterndrive and inboard model engines, providing reliable seawater circulation to prevent overheating and maintain optimal engine performance.

Key Features:

• Genuine Mercury Marine OEM part for guaranteed fitment and quality
• Complete housing assembly for simplified installation
• Includes 47-862232A2 impeller
• Precision-engineered for 4.5L and 6.2L MPI engines
• Durable marine-grade construction for saltwater and freshwater applications

Superseded Part Numbers:

This part supersedes Mercury part numbers 8M0118072, 8M0122665, and 8M0137209, making it the current replacement for these discontinued assemblies. If you're replacing an older impeller housing, the 8M0139978 is the updated direct-fit replacement.

Regular maintenance of your impeller housing assembly is critical for preventing engine damage from overheating. This assembly is a vital component of your MerCruiser's raw water cooling system, ensuring proper coolant flow through the engine block.