Part Number:
Mercury 46-807151A9 Sea Water Pump Assembly
Maintain reliable cooling system performance with the Mercury 46-807151A9 Sea Water Pump Assembly. Designed as a genuine OEM replacement, this complete sea water pump assembly helps circulate raw water through the engine and exhaust system to maintain safe operating temperatures and dependable performance on the water.
The sea water pump is a critical component of the marine cooling system. Over time, internal pump components can wear from heat, debris, corrosion, and continuous operation, leading to reduced water flow and potential overheating issues. Replacing the entire pump assembly helps restore cooling system efficiency and provides a dependable long-term solution for worn or damaged pumps.
Manufactured to Mercury Marine factory specifications, the 46-807151A9 assembly is built using durable marine-grade materials engineered for reliable operation in both freshwater and saltwater environments. Designed as a direct-fit replacement, it provides dependable fitment and straightforward installation for compatible MerCruiser applications.
Common Engine Fitments
The Mercury 46-807151A9 sea water pump assembly is commonly used on select MerCruiser inboard and sterndrive engines, including:
- MerCruiser 5.0L MPI
- MerCruiser 5.7L MPI
- MerCruiser 350 MAG
- MerCruiser 377 MAG
- MerCruiser 6.2L MPI
- MerCruiser 8.1L Horizon
These engines are frequently found in:
- Sea Ray cruisers and sport boats
- Chaparral Signature and SSi models
- Four Winns Horizon and Vista series
- Regal bowriders and cruisers
- Crownline sport boats
- Formula performance boats
The 46-807151A9 assembly is commonly used in belt-driven raw water cooling systems where maintaining consistent sea water circulation is essential for engine cooling and exhaust temperature control.
Fitment can vary depending on engine serial number and pump configuration, so confirming compatibility with part number 46-807151A9 before ordering is recommended.
Key Features
- Genuine Mercury Marine OEM sea water pump assembly
- Complete replacement assembly for raw water cooling systems
- Helps restore proper cooling water circulation
- Designed for MerCruiser inboard and sterndrive applications
- Marine-grade construction for durability and long service life
- Direct-fit replacement for straightforward installation
Why Replace the Entire Sea Water Pump Assembly?
Over time, bearings, seals, housings, and internal pump components can wear and reduce cooling system efficiency. Replacing the complete assembly helps restore reliable water flow, reduce maintenance downtime, and protect your engine from overheating-related damage.
If you’re servicing a compatible MerCruiser-powered boat, the Mercury 46-807151A9 sea water pump assembly delivers the OEM-quality fit and dependable cooling performance your engine was designed for.