Thermostat 74°C – Fits Volvo Penta MD11C/D MD17C/D (Replaces 877349)
Thermostat 74°C – Fits Volvo Penta MD11C/D MD17C/D (Replaces 877349) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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 74°C – Fits Volvo Penta MD11C/D MD17C/D (Replaces 877349)
Product Details
This aftermarket Thermostat 74°C – Fits Volvo Penta MD11C/D MD17C/D is engineered for Volvo Penta marine diesel engines, including models MD11C, MD11D, MD17C, and MD17D. It ensures your engine operates at the correct temperature for optimal performance and efficiency, replacing original part number 877349.
This component serves as a direct interchange for Volvo Penta part numbers 877349, 875784, 838501, and Orbitrade ORB-15784.
- Installation Type: Direct replacement for a hassle-free fit.
- Operating Temperature: Opens at 74°C (165°F) to maintain stable engine conditions.
- Complete Kit: Supplied with the necessary O-ring for a reliable seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 877349 |
| Volvo Penta | 875784 |
| Volvo Penta | 838501 |
| Orbitrade | ORB-15784 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | OEM Part No. |
|---|---|---|
| Volvo Penta | MD11C | 877349 |
| Volvo Penta | MD11D | 877349 |
| Volvo Penta | MD17C | 877349 |
| Volvo Penta | MD17D | 877349 |
Technical Specs
- Product Type
- Thermostat
- Installation
- Direct replacement
- Temperature Rating
- 74°C (165°F)
- Operating Temperature
- 74°C (165°F) opening temperature
- Dimensions
- 16.0 L x 10.0 W x 5.0 H
- Other Technical Attributes
- Supplied with O-ring
What’s in the Box
- 1 x Thermostat (877349)
- 1 x O-ring
Installation Notes
Important: This thermostat is designed to be used only with thermostat box 829916. Please confirm your housing part number is compatible before starting the installation.
- Ensure the engine is completely cool and the battery is disconnected.
- Drain the engine coolant to a level below the thermostat housing.
- Carefully remove the bolts from the thermostat housing cover.
- Note the orientation of the old thermostat before removing it from the housing.
- Thoroughly clean the mating surfaces of the housing and its cover.
- Install the new thermostat and the supplied O-ring, ensuring correct alignment.
- Re-attach the housing cover and tighten the bolts to the torque specified by the manufacturer.
- Refill the cooling system with the appropriate coolant.
- Start the engine, allow it to warm up, and carefully check for any leaks.
Troubleshooting & FAQ
Will this thermostat fit my engine?
This thermostat is a direct replacement for Volvo Penta diesel models MD11C, MD11D, MD17C, and MD17D. To guarantee fitment, always compare your engine model and original part number (e.g., 877349) against the details in this listing.
What are the signs of a failing thermostat?
Common symptoms of a faulty thermostat include engine overheating, the engine failing to reach its normal operating temperature, erratic temperature gauge readings, or coolant leakage from the thermostat housing area.
What is the correct operating temperature for this part?
This thermostat is rated to begin opening at 74°C (165°F), which helps regulate the engine's temperature for peak performance and longevity.
Is this part compatible with any thermostat housing?
No, this is a critical detail. This thermostat is only suitable for thermostat box 829916. Using it with a different housing may result in improper fitment, leaks, or engine cooling problems.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
