5Pcs Mercury Mercruiser Sterndrive IO Thermostat Housing Sleeve 23-806922 174951

5-Piece Thermostat Housing Sleeve for Mercury MerCruiser

This thermostat housing sleeve for Mercury MerCruiser sterndrive IO engines is a direct replacement for OEM part numbers 23-806922 and 174951. It fits inside the thermostat housing to direct coolant flow and help regulate engine temperature. This 5-piece set of thermostat housing sleeves is ideal for servicing Mercury MerCruiser sterndrive IO cooling systems.

Overview

This 5-piece thermostat housing sleeve set is a direct replacement for Mercury MerCruiser sterndrive IO cooling systems. Each thermostat housing sleeve is designed to keep the thermostat seated and coolant flow steady during engine operation. For Mercury MerCruiser sterndrive IO applications, this kit provides reliable cooling system service parts.

Built For Performance

• Direct replacement for OEM part numbers 23-806922 and 174951
• Includes 5 sleeves for complete thermostat housing service
• Designed for Mercury MerCruiser sterndrive IO cooling systems
• Helps maintain proper coolant flow and thermostat operation
• Precision fit for reliable OEM-style performance

On-The-Job Use

• Replacing a worn thermostat housing sleeve for MerCruiser sterndrive cooling system repair
• Restoring proper coolant flow after thermostat housing disassembly
• Maintaining consistent engine temperature in marine sterndrive applications

Specs At A Glance

Good To Know

Q: Is this thermostat housing sleeve intended for Mercury MerCruiser sterndrive IO engines? A: It is designed for Mercury MerCruiser sterndrive IO engines and references OEM part numbers 23-806922 and 174951. Confirm the engine serial number before ordering.

Q: What does a thermostat housing sleeve do? A: The sleeve helps direct coolant through the thermostat housing and keeps the thermostat seated properly. Replacing a worn sleeve can help maintain consistent engine temperature.

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