Thermostat Housing Assembly Kit for MAG MerCruiser 4.3-6.3L MPI 350 - 863457A2

Thermostat Housing Assembly Kit for MerCruiser

This thermostat housing assembly kit is a direct replacement for MerCruiser 4.3-6.3L MPI 350 engines and cross-references OEM part number 863457A2.

Overview

This thermostat housing assembly kit is designed for MerCruiser 4.3-6.3L MPI 350 marine engines. It provides a complete replacement for the factory thermostat housing, ensuring proper coolant flow and engine temperature regulation. This kit is ideal for boat owners and marine technicians performing cooling system repairs on MerCruiser engines.

Built For Performance

• Constructed from corrosion-resistant materials for marine environments
• Includes all necessary gaskets and hardware for installation
• Precise fitment for MerCruiser 4.3-6.3L MPI engines
• OEM-spec design ensures reliable cooling system operation
• Direct replacement for part number 863457A2

Fits These Machines

• for MerCruiser 4.3L MPI
• for MerCruiser 5.0L MPI
• for MerCruiser 5.7L MPI
• for MerCruiser 6.2L MPI
• for MerCruiser 350 MPI

On-The-Job Use

• Replacing failed thermostat housings on MerCruiser marine engines
• Cooling system overhaul during routine maintenance
• Winterization and engine storage preparation
• Restoring engine temperature control for optimal performance

Specs At A Glance

Good To Know

Q: Can this kit be used on a MerCruiser 5.0L MPI? A: Yes, this thermostat housing assembly kit is compatible with MerCruiser 4.3-6.3L MPI engines including the 5.0L MPI, provided the engine uses the same housing design.

Q: Does the kit include gaskets? A: Yes, the kit includes all necessary gaskets and hardware to complete the installation.

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