Volvo Penta Thermostat 3839110 – Fits Volvo Penta TAMD/TMD 61-75 Series
Volvo Penta Thermostat 3839110 – Fits Volvo Penta TAMD/TMD 61-75 Series is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Volvo Penta Thermostat 3839110 – Fits Volvo Penta TAMD/TMD 61-75 Se...
Product Details
This is a high-quality aftermarket thermostat designed for Volvo Penta diesel engines. The Volvo Penta Thermostat 3839110 ensures your engine maintains its optimal operating temperature of 75°C (167°F). It is engineered for a precise fit in TAMD and TMD series models including the 61, 62, 71, 72, 73, 74, and 75 series.
This part is a direct replacement for Volvo Penta part numbers 3839110 and its predecessor, 1661993.
- Engineered for OEM-level fit and function in the engine cooling system.
- Maintains a consistent operating temperature of 75°C (167°F).
- Includes one thermostat ready for installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Volvo Penta | 1661993 | 3839110 |
| Volvo Penta | 3839110 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This thermostat is compatible with a wide range of Volvo Penta TAMD, TMD, and TWD series engines.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Volvo Penta | TAMD61 | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD61A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD62A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD71 | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD71A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD71B | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD72 | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD72A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD72B | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD72EDC | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD72P | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD72P-A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD73P | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD73P-A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD74EDC | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD74L-A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD74L-B | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD74P-A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD74P-B | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD74A | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD74C | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD75 | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD75P | 4-Stroke | 3839110 | |
| Volvo Penta | TAMD75P-A | 4-Stroke | 3839110 | |
| Volvo Penta | TWD1031VE | 4-Stroke | 3839110 | Referenced in PalmerPower source |
Technical Specs
- Product Type
- Thermostat
- Installation
- Engine cooling system
- Temperature Rating
- 75°C (167°F)
- Connection
- Direct OEM fitment
- Dimensions
- 10.5 x 10.5 x 10.5
- Operating Temperature
- 75°C (167°F)
- Warranty
- 1-Year Manufacturer Warranty
What’s in the Box
- 1 x Thermostat (3839110)
Installation Notes
- Ensure the engine is completely cool before starting. Disconnect the battery for safety.
- Place a drain pan underneath and carefully drain the engine coolant.
- Locate the thermostat housing on the engine. It is typically a metal dome connected to the main coolant hoses.
- Remove the bolts securing the housing. You may need to gently tap it to break the gasket seal.
- Remove the old thermostat, taking note of its orientation.
- Clean both the housing and engine mounting surfaces thoroughly, removing all old gasket material.
- Install the new thermostat in the correct orientation. A new gasket should also be used.
- Re-secure the thermostat housing, tightening bolts to the manufacturer's recommended torque.
- Reconnect all hoses and refill the cooling system with the appropriate coolant.
- Reconnect the battery, start the engine, and check for leaks as it warms up. Top off coolant if necessary.
Troubleshooting & FAQ
How do I know if my thermostat is failing?
Common signs of a failing thermostat include engine overheating, running too cool (not reaching operating temperature), erratic temperature gauge readings, or coolant leaks around the thermostat housing.
What temperature does this thermostat operate at?
This thermostat is rated to open at 75°C (167°F), ensuring your Volvo Penta engine operates within its ideal temperature range for performance and longevity.
Will this fit my Volvo Penta TAMD73P-A engine?
Yes, this thermostat is specified as a direct replacement for the TAMD73P-A model, along with many others in the TAMD and TMD 61-75 series. Always check the Part Number Matrix and Engine Compatibility table to be certain.
How often should a marine engine thermostat be replaced?
While there is no fixed interval, it is good practice to inspect the thermostat during routine cooling system service and consider replacement every few years, especially if operating in saltwater environments where corrosion can be a factor.
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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