Mercury 89749 Thermostat Cover to Port Exhaust Manifold Hose

The Mercury 89749 Thermostat Cover to Port Exhaust Manifold Hose is a genuine Mercury replacement cooling hose for select MerCruiser engine applications. This molded hose connects the thermostat cover or thermostat housing to the port-side exhaust manifold where specified by the engine parts diagram.

Built to Mercury Marine fit, function, and performance standards, this hose helps maintain proper cooling water flow between the thermostat assembly and exhaust manifold. Replacing a worn, cracked, swollen, or leaking hose helps support dependable cooling system performance and helps prevent water leaks in the engine compartment.

Product Features:

• Genuine Mercury thermostat cover to port exhaust manifold hose
• Connects the thermostat cover or thermostat housing to the port exhaust manifold
• Molded hose design helps provide proper routing and fit
• Helps maintain cooling water flow through compatible MerCruiser systems
• Direct replacement for worn, cracked, swollen, or leaking hoses
• Commonly referenced as Mercury / MerCruiser hose 32-89749
• Built to Mercury Marine fit, function, and performance standards

Product Details:

• Brand: Mercury
• Manufacturer Part Number: 89749
• Alternate Part Number: 32-89749
• Part Type: Molded Cooling Hose
• Hose Location: Thermostat cover to port exhaust manifold
• System: MerCruiser engine cooling system
• Application: Select MerCruiser sterndrive and inboard engines where specified

Fits Select Applications:

• Select MerCruiser engine applications using Mercury / MerCruiser hose 89749 or 32-89749
• Commonly listed for thermostat housing to port exhaust manifold cooling hose applications
• May be used on select MerCruiser V8 cooling system configurations where called out by the parts diagram

Service Note: Inspect cooling hoses regularly for cracking, soft spots, swelling, leaks, clamp damage, and signs of age or heat exposure. Replace hose clamps as needed and confirm all hose connections are properly seated and secured during installation.

Fitment Note: Cooling hose fitment should be verified by engine model, serial number, cooling system configuration, hose routing, parts diagram, and existing hose part number before ordering. Please confirm Mercury 89749 or 32-89749 is the correct thermostat cover to port exhaust manifold hose for your MerCruiser engine before purchasing.

WARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov