Thermostat Kit 60°C (140°F) – Fits Volvo Penta AQ/MD Series (Replaces 876080, 876097, 875781)
Thermostat Kit 60°C (140°F) – Fits Volvo Penta AQ/MD Series (Replaces 876080, 876097, 875781) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Thermostat Kit 60°C (140°F) – Fits Volvo Penta AQ/MD Series (Replac...
Product Details
This Thermostat Kit 60°C (140°F) is engineered for Volvo Penta gasoline and diesel engines with raw water cooling systems, including AQ, BB, MB, AQD, and MD series models from 1968 to 1994. The 60°C (140°F) thermostat helps maintain optimal engine operating temperature for improved efficiency and longevity.
It serves as a direct replacement for multiple original and aftermarket part numbers, including Volvo Penta 876080, 876097, and 875781, as well as Sierra 18-3656.
- Installation: Direct OEM-style replacement
- Operating Temperature: 60°C (140°F)
- Compatibility: Designed for raw water cooling systems
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 876080 |
| Volvo Penta | 876097 |
| Volvo Penta | 875781 |
| Volvo Penta | 875790 |
| Volvo Penta | 824912 |
| Volvo Penta | 82812 |
| Volvo Penta | 841951 |
| Volvo Penta | 858640 |
| Volvo Penta | 876797 |
| Sierra | 18-3656 |
| Orbitrade | 15097 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Volvo Penta gasoline engines, this kit fits various AQ, BB, and MB series models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ60 | 60 | 4-Stroke | 1968–1983 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | AQ90, AQ95, AQ95A | 90-95 | 4-Stroke | 1968–1983 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | AQ105A | 105 | 4-Stroke | 1970–1975 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | AQ110 | 110 | 4-Stroke | 1972–1980 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | AQ115A, AQ115B | 115 | 4-Stroke | 1968–1983 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | AQ120 | 120 | 4-Stroke | 1968–1983 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | AQ130A, AQ130B, AQ130C, AQ130D | 130 | 4-Stroke | 1968–1983 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | BB30, BB100 | 30-100 | 4-Stroke | 1968–1983 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | BB115A, BB115B, BB115C | 115 | 4-Stroke | 1968–1983 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | MB18 | 80 | 4-Stroke | 1977–1984 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | MB20A, MB20B, MB20C | 90-120 | 4-Stroke | 1977–1993 | 876097, 876080, 875781 | Raw water cooled |
For Volvo Penta diesel engines, this kit is compatible with specific raw water cooled AQD and MD series models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQD2B | 25 | 4-Stroke | 1977–1985 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | MD1B, MD2B, MD3B | 7-25 | 4-Stroke | 1975–1989 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | MD11, MD11C, MD11D | 23-25 | 4-Stroke | 1975–1994 | 876097, 876080, 875781 | Raw water cooled |
| Volvo Penta | MD17, MD17C, MD17D | 36 | 4-Stroke | 1975–1994 | 876097, 876080, 875781 | Raw water cooled |
Technical Specs
- Product Type
- Marine Engine Thermostat Kit
- Installation
- OEM Direct Replacement
- Fuel Type
- Compatible with Gas and Diesel Engines
- Housing Material
- Marine-Grade Metal (Brass)
- Operating Temperature
- 60°C (140°F)
- Cooling System
- Raw water cooling system compatible
- Product Dimensions
- 8.0" L x 7.0" W x 7.0" H
- Package Dimensions
- 8.0" L x 7.0" W x 7.0" H
What’s in the Box
- 1 x Thermostat Kit (Replaces 876097/876080/875781)
Installation Notes
- Ensure the engine is completely cool before beginning.
- Drain the engine block's cooling system to a level below the thermostat housing.
- Locate and carefully unbolt the thermostat housing cover.
- Remove the old thermostat and gasket, noting its orientation.
- Thoroughly clean both the housing and cover mating surfaces of any old gasket material or corrosion.
- Install the new thermostat in the correct orientation, followed by the new gasket.
- Re-secure the housing cover, tightening bolts evenly to the manufacturer's specified torque.
- Refill the cooling system with the appropriate coolant.
- Start the engine, check for leaks around the housing as it warms up, and top off coolant if necessary.
Troubleshooting & FAQ
How do I know if this thermostat fits my engine?
Check the "Engine & Model Compatibility" section on this page. Compare your engine model, series, and year against the provided tables. It is also crucial to verify part numbers listed in the "Part Number Matrix" with your existing part number.
What are the signs of a failing thermostat?
Common symptoms include engine overheating (if stuck closed) or taking too long to reach operating temperature (if stuck open). You may also notice erratic temperature gauge readings or poor engine performance.
What temperature does this thermostat operate at?
This is a 60°C (140°F) thermostat, designed specifically for raw water cooled marine engines to ensure they operate in their optimal temperature range for performance and longevity.
How often should I replace my engine's thermostat?
While there is no fixed interval, it is good practice to inspect the thermostat during routine cooling system service or replace it every few years as preventative maintenance, especially for boats operated in saltwater.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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