Thermostat Kit 180°F (82°C) – Fits Volvo Penta 110-167 HP Sterndrives (Replaces 875580)
Thermostat Kit 180°F (82°C) – Fits Volvo Penta 110-167 HP Sterndrives (Replaces 875580) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
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 aftermarket Thermostat Kit 180°F (82°C) – Fits Volvo Penta 110-167 HP Sterndrives (Replaces 875580) is engineered for Volvo Penta sterndrive engines, primarily 4-stroke models from 110 HP to 167 HP manufactured between 1975–1993. It maintains the correct engine operating temperature for optimal performance, fuel efficiency, and longevity.
It serves as a direct cross-reference for Volvo Penta 875580, Sierra 18-3666, and Mallory 9-43010.
- Maintains a precise operating temperature of 180°F (82°C).
- Designed for direct OEM-style installation in a standard housing mount.
- Includes the required seal ring/gasket for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Volvo Penta | 875580 |
| Sierra | 18-3666 |
| Mallory | 9-43010 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ120B | 120 | 4-Stroke | 1977–1993 | 875580 | |
| Volvo Penta | AQ125A, AQ125B | 125 | 4-Stroke | 1975–1985 | 875580 | |
| Volvo Penta | AQ131A, AQ131B, AQ131C, AQ131D | 131 | 4-Stroke | 1985–1989 | 875580 | |
| Volvo Penta | AQ140A | 140 | 4-Stroke | 1975–1979 | 875580 | |
| Volvo Penta | AQ145A, AQ145B | 145 | 4-Stroke | 1979–1985 | 875580 | |
| Volvo Penta | AQ151A, AQ151B, AQ151C | 151 | 4-Stroke | 1985–1889 | 875580 | |
| Volvo Penta | AQ171A, AQ171C | 171 | 4-Stroke | 1986–1989 | 875580 | |
| Volvo Penta | BB140A | 140 | 4-Stroke | 1975–1979 | 875580 | |
| Volvo Penta | BB145A | 145 | 4-Stroke | 1979–1985 | 875580 | |
| Volvo Penta | 230A, 230B | 120 | 4-Stroke | 1989–1993 | 875580 | |
| Volvo Penta | 250A, 250B | 146 | 4-Stroke | 1989–1993 | 875580 | |
| Volvo Penta | 251A | 167 | 4-Stroke | 1989–1992 | 875580 |
Technical Specs
- Product Type
- Marine Engine Thermostat Kit
- Installation
- Direct OEM Replacement
- Connection
- Standard Housing Mount
- Operating Temperature
- 180°F (82°C)
- Warranty
- 1 Year (Aftermarket)
- Other Technical Attributes
- Includes Seal Ring/Gasket
- Product Dimensions
- Height: 6.0 in; Width: 6.0 in; Length: 6.0 in;
- Box Dimensions
- Height: 6.0 in; Width: 6.0 in; Length: 6.0 in;
What’s in the Box
- 1 x Thermostat (Replaces Volvo Penta 875580)
- 1 x Seal Ring/Gasket (Replaces Volvo Penta 416033)
Installation Notes
- Ensure the engine is completely cool before starting.
- Drain the engine coolant into a suitable container.
- Locate the thermostat housing and carefully remove the bolts or screws.
- Remove the old thermostat and gasket. Note the orientation of the thermostat.
- Thoroughly clean both the housing and engine block mating surfaces.
- Install the new thermostat in the correct orientation, followed by the new gasket/seal.
- Re-install the housing and tighten bolts to the manufacturer's specified torque.
- Refill the cooling system with the appropriate coolant.
- Run the engine, check for any leaks, and monitor the temperature gauge to ensure it stabilizes at the correct operating temperature.
Troubleshooting & FAQ
How do I confirm this kit fits my specific engine?
The best way is to cross-reference your existing part number with the ones listed in the Part Number Matrix (Volvo Penta 875580, Sierra 18-3666, Mallory 9-43010). Additionally, verify your engine model and year against the compatibility table.
Why is the 180°F (82°C) temperature important?
This temperature is specified by the OEM to ensure the engine runs at its peak efficiency. It allows for proper fuel combustion, reduces internal wear, and prevents both overheating and over-cooling, which can lead to carbon buildup and poor performance.
What are common signs of a failing thermostat?
Symptoms include engine overheating, the temperature gauge reading unusually low after warm-up, or erratic temperature fluctuations. A thermostat stuck open will prevent the engine from reaching operating temperature, while one stuck closed will cause rapid overheating.
How often should a marine thermostat be replaced?
While there is no fixed interval, it is good practice to inspect it annually and consider replacement every 3-5 years as preventative maintenance, especially in saltwater environments. It should be replaced immediately if any signs of failure are observed.
Is this an OEM or aftermarket part?
This listing is for a high-quality aftermarket replacement, not an OEM component. It has been engineered to meet or exceed OEM-level specifications using comparable materials and is manufactured in an ISO 9002 certified facility, with batch inspections for quality assurance.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free to most regions. Expedited shipping options, where available, will be presented at checkout for an additional fee.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears on a compatibility list—do not purchase.
- This is an aftermarket replacement component, not an Original Equipment Manufacturer (OEM) part.
- Professional installation is highly recommended for safety, performance, and to prevent damage to your engine.
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 quality control.
Payment & Security
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