160°F Marine Thermostat for MerCruiser Stern Drive V6/V8 Engines – Replaces 8072522, 807252T2, 8052732, 8M0091470
160°F Marine Thermostat for MerCruiser Stern Drive V6/V8 Engines – Replaces 8072522, 807252T2, 8052732, 8M0091470 is backordered and will ship as soon as it is back in stock.
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160°F Marine Thermostat for MerCruiser Stern Drive V6/V8 Engines – ...
160°F Marine Thermostat for MerCruiser Stern Drive V6/V8 Engines – Replaces 8072522, 807252T2, 8052732, 8M0091470 is backordered and will ship as soon as it is back in stock.
Product Details
This 160°F (71°C) marine thermostat is intended for MerCruiser stern-drive and outdrive applications using compatible V6 and V8 engines. It is designed to help regulate engine operating temperature when the listed temperature rating and application match the engine manufacturer's specifications.
The thermostat is associated with the following manufacturer reference numbers: 8072522, 807252T2, 8052732, and 8M0091470. The aftermarket reference commonly associated with this application is Sierra 18-3649.
- 160°F (71°C) operating temperature rating.
- Application scope: compatible MerCruiser stern-drive/outdrive V6 and V8 engines.
- Sold as one thermostat; gaskets and other housing components are not included unless separately stated.
Part Number Matrix
Use the references below to compare the thermostat with the part removed from your engine. Always verify the complete engine application before ordering.
| Reference Type | Part Number |
|---|---|
| Mercury/MerCruiser reference | 8072522, 807252T2, 8052732, 8M0091470 |
| Aftermarket reference | Sierra 18-3649 |
Engine & Model Compatibility
This thermostat is for MerCruiser stern-drive or outdrive V6 and V8 engines. The available records do not establish one universal year range, displacement range, serial-number range, or Alpha/Bravo designation for every engine. Confirm the exact engine model, serial number, cooling-system configuration, thermostat temperature, and removed-part number against the service manual before installation.
| Brand/Application | Engine Configuration | Temperature | Reference Numbers | Fitment Requirement |
|---|---|---|---|---|
| MerCruiser stern drive/outdrive | Compatible V6 engines | 160°F (71°C) | 8072522, 807252T2, 8052732, 8M0091470 | Verify exact model, serial number, cooling configuration, and original thermostat. |
| MerCruiser stern drive/outdrive | Compatible V8 engines | 160°F (71°C) | 8072522, 807252T2, 8052732, 8M0091470 | Verify exact model, serial number, cooling configuration, and original thermostat. |
Technical Specifications
- Product Type
- Marine engine thermostat
- Application
- MerCruiser stern-drive/outdrive V6 and V8 engines
- Temperature Rating
- 160°F (71°C)
- Installation Location
- Thermostat housing within the engine cooling system
- Quantity
- One thermostat
What's in the Box
- 1 x 160°F (71°C) marine thermostat
Thermostat housing gaskets, cover gaskets, seals, and other installation parts are not included unless specifically listed with the product.
Installation Notes
- Allow the engine to cool completely before beginning work.
- Disconnect the battery and follow the engine manufacturer's safety procedures.
- Locate the thermostat housing and remove the components necessary to access the thermostat.
- Compare the replacement thermostat with the original part, including its temperature rating and physical configuration.
- Remove the old thermostat and clean the mating surfaces carefully without damaging the housing.
- Install the thermostat in the correct orientation according to the service manual.
- Replace any required gasket or seal; these parts are not included with this thermostat.
- Reassemble the housing using the manufacturer's tightening sequence and torque specifications.
- Restore the cooling system as required, start the engine, and check for leaks and correct operating temperature.
Troubleshooting & FAQ
What temperature is this thermostat?
This thermostat is rated at 160°F (71°C).
Which engines is it intended for?
This listing identifies it for compatible MerCruiser stern-drive or outdrive V6 and V8 engines. Exact model, year, serial-number, and cooling-system confirmation is required before installation.
Which reference numbers does it replace?
The listed reference numbers are 8072522, 807252T2, 8052732, and 8M0091470. Sierra 18-3649 is an associated aftermarket reference. Confirm the number on your original thermostat before ordering.
Is this a thermostat kit?
No. This product is sold as one thermostat. Gaskets and other thermostat-housing components are separate unless specifically included in the order.
Can I use it with any MerCruiser V6 or V8?
No universal fitment should be assumed. Verify the engine model, serial number, cooling-system configuration, required thermostat temperature, and original part number with the service manual.
What are common signs of thermostat problems?
Possible symptoms include overheating, running below the intended operating temperature, unstable temperature readings, or slow warm-up. Diagnose the cooling system before replacing the thermostat.
Safety & Important Information
- Work only on a cool engine and follow the applicable service-manual procedures.
- Do not rely on engine displacement, horsepower, or general V6/V8 descriptions alone to confirm fitment.
- Verify the thermostat temperature, housing style, original part number, and serial-number range before installation.
- Professional installation is recommended when the correct cooling-system procedure or torque specifications are uncertain.
About Sea Sierra
- Marine Replacement Parts — Parts selected for common marine engine and stern-drive service applications.
- Application-Focused Information — Check the engine and original-part details before ordering to help ensure the correct replacement.
- Support for Installation — Consult the engine service manual or a qualified marine technician for fitment and installation guidance.
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