Thermostat Kit 180°F (82°C) – Fits Volvo Penta 110-167 HP Sterndrive (Replaces 875580, 18-3666)
Thermostat Kit 180°F (82°C) – Fits Volvo Penta 110-167 HP Sterndrive (Replaces 875580, 18-3666) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Thermostat Kit 180°F (82°C) – Fits Volvo Penta 110-167 HP Sterndriv...
Product Details
This Thermostat Kit 180°F (82°C) – Fits Volvo Penta 110-167 HP Sterndrive (Replaces 875580, 18-3666) is engineered for a wide range of Volvo Penta sterndrive engines, primarily from 1975 to 1993, with horsepower ratings from 110 to 167 HP. It is designed to maintain the engine's optimal operating temperature at a consistent 180°F (82°C).
This kit serves as a direct replacement for Volvo Penta 875580, Sierra 18-3666, and Mallory 9-43010, providing a reliable aftermarket alternative for engine maintenance and repair.
- Designed for direct OEM replacement installation.
- Maintains a factory-specified engine temperature of 180°F (82°C).
- Includes the required seal ring/gasket for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 875580 |
| Sierra | 18-3666 |
| Mallory | 9-43010 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for the following Volvo Penta Sterndrive engines:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ120B | 120 | 4-Stroke | 1985–1993 | 875580 | |
| Volvo Penta | AQ125A, AQ125B | 125 | 4-Stroke | 1975–1979 | 875580 | |
| Volvo Penta | AQ131A, AQ131B, AQ131C, AQ131D | 131 | 4-Stroke | 875580 | ||
| Volvo Penta | AQ140A, AQ145A, AQ145B | 140/145 | 4-Stroke | 875580 | ||
| Volvo Penta | AQ151A | 151 | 4-Stroke | 875580 | ||
| Volvo Penta | AQ171A | 171 | 4-Stroke | 875580 | ||
| Volvo Penta | BB140, BB145A | 140/145 | 4-Stroke | 875580 | ||
| Volvo Penta | 110 HP | 110 | 4-Stroke | 1977–1980 | 875580 | |
| Volvo Penta | 117 HP | 117 | 4-Stroke | 1983–1985 | 875580 | |
| Volvo Penta | 138 HP | 138 | 4-Stroke | 1979–1985 | 875580 | |
| Volvo Penta | 146 HP | 146 | 4-Stroke | 1985–1993 | 875580 | |
| Volvo Penta | 167 HP | 167 | 4-Stroke | 1986–1992 | 875580 |
Technical Specs
- Product Type
- Marine Engine Thermostat Kit
- Installation
- Direct OEM Replacement
- Temperature Rating
- 180°F (82°C)
- Connection
- Standard Housing Mount
- Operating Temperature
- 180°F (82°C)
- Warranty
- 1 Year (Aftermarket)
- Other Technical Attributes
- Includes Seal Ring/Gasket
What’s in the Box
- 1 x Thermostat (Replaces Volvo Penta 875580)
- 1 x Seal Ring/Gasket
Installation Notes
- Ensure the engine is completely cool before starting.
- Drain the engine coolant into a suitable container.
- Locate the thermostat housing on the engine and remove the mounting bolts.
- Carefully remove the old thermostat and gasket. Note its orientation.
- Clean both the housing and engine mating surfaces thoroughly to remove any old gasket material or corrosion.
- Install the new thermostat in the correct orientation, followed by the new seal ring/gasket.
- Re-secure the thermostat housing, tightening the bolts to the manufacturer's specified torque.
- Refill the cooling system with the appropriate coolant.
- Start the engine, check for leaks, and monitor the temperature gauge to ensure it reaches and maintains the correct operating temperature.
Troubleshooting & FAQ
What are the signs of a failing thermostat?
Common symptoms include engine overheating, the engine not reaching normal operating temperature (running too cool), erratic temperature gauge readings, or coolant leaks from the thermostat housing area.
Is the gasket or seal ring included with this kit?
Yes, the kit includes one new seal ring/gasket to ensure a proper, leak-free installation.
How can I confirm this kit fits my engine?
First, check the "Engine & Model Compatibility" table in this listing. If your engine model and year are listed, it is a confirmed fit. You should also cross-reference your existing part number with those in the "Part Number Matrix."
What temperature is this thermostat rated for?
This thermostat is designed to open at 180°F (82°C) to maintain your engine's optimal operating temperature as specified by the manufacturer.
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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