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Description
Thermostat Repair Kit – Fits OMC Cobra 120/140, Volvo Penta 2.5L & 3.0L (Replaces 3853799, 982554)Thermostat Repair Kit Fits OMC Cobra 120 140, Volvo Penta 2. 5L & 3. 0L This thermostat repair kit is designed for a range of OMC Cobra and Volvo Penta sterndrive engines. It ensures your engine maintains the correct operating temperature for optimal performance and efficiency. This kit is a direct replacement for OMC part numbers 3853799, 982554, and 778064; Sierra 18 3670; and GLM 13440. Operating Temperature: 160F (71C) Installation: Direct fit for
Thermostat Repair Kit – Fits OMC Cobra 120/140, Volvo Penta 2.5L & 3.0L
This thermostat repair kit is designed for a range of OMC Cobra and Volvo Penta sterndrive engines. It ensures your engine maintains the correct operating temperature for optimal performance and efficiency.
This kit is a direct replacement for OMC part numbers 3853799, 982554, and 778064; Sierra 18-3670; and GLM 13440.
- Operating Temperature: 160°F (71°C)
- Installation: Direct fit for specified models
- Complete Kit: Includes thermostat and necessary housing gaskets for a full replacement.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| OMC | 3853799 |
| OMC | 982554 |
| OMC | 778064 |
| Sierra | 18-3670 |
| GLM | 13440 |
Compatible Engine Models
Confirm your engine model/year in the table below.
OMC
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC | Cobra | 120 | 4-Stroke | 1980-1981 | 3853799 | Also known as 982554 |
| OMC | Cobra | 140 | 4-Stroke | 1980-1981 | 3853799 | Also known as 982554 |
| OMC | Sterndrive | 2.5L (252ci) | 4-Stroke | 1982-1986 | 3853799 | Also known as 982554 |
| OMC | Sterndrive | 3.0L (302ci) | 4-Stroke | 1982-1998 | 3853799 | Also known as 982554 |
Volvo Penta
| Brand | Model | Stroke | Notes |
|---|---|---|---|
| Volvo Penta | 3.0GLP | 4-Stroke | Fits 4 cylinder models 1968 and newer |
| Volvo Penta | 3.0GLM | 4-Stroke | Fits 4 cylinder models 1968 and newer |
| Volvo Penta | 3.0GSM | 4-Stroke | Fits 4 cylinder models 1968 and newer |
| Volvo Penta | 3.0GSP | 4-Stroke | Fits 4 cylinder models 1968 and newer |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Thermostat Repair Kit |
| Installation | Direct OEM replacement |
| Temperature Rating | 160°F (71°C) |
| Application | Marine sterndrive engines |
| Other Technical Attributes | Includes thermostat and housing gaskets |
Package Contents
- 1 x Thermostat (Replaces 3853799/982554/778064)
- 1 x Thermostat Housing Cover Gasket (Replaces 314809/3852127/777906)
- 1 x Thermostat Gasket (Replaces 313416/3852120/777848)
Installation Guide
- Safety First: Ensure the engine is completely cool before starting. Disconnect the battery.
- Drain Coolant: Place a drain pan under the thermostat housing and drain the coolant to a level below the housing.
- Locate Housing: Identify the thermostat housing, typically located where the main coolant hose from the engine connects to the cylinder head or intake manifold.
- Remove Housing Cover: Loosen and remove the bolts securing the thermostat housing cover.
- Remove Old Thermostat: Carefully lift the old thermostat out of the housing. Note its orientation.
- Clean Surfaces: Scrape away any old gasket material from both the housing and the cover mating surfaces. Ensure surfaces are clean and dry.
- Install New Gaskets: Place the new thermostat gasket and housing cover gasket in position.
- Install New Thermostat: Insert the new thermostat into the housing, making sure it is oriented correctly (spring-side towards the engine).
- Reattach Cover: Secure the housing cover and tighten the bolts evenly to the manufacturer's recommended torque.
- Refill Coolant: Refill the cooling system with the appropriate coolant mixture.
- Check for Leaks: Reconnect the battery. Start the engine and let it run, checking for any leaks around the thermostat housing.
- Final Check: Once the engine reaches operating temperature, check the coolant level and top off if necessary.
Troubleshooting & FAQ
Q: How do I confirm this thermostat kit will fit my engine?
A: Please review the Compatible Engine Models tables provided on this page. Cross-reference your engine's brand, model, and year to ensure compatibility. Verifying part numbers against our cross-reference table is also recommended.
Q: What are the signs of a failing thermostat?
A: Common symptoms include engine overheating (temperature gauge in the red) or the engine not reaching its normal operating temperature (running too cool). Inaccurate temperature gauge readings can also indicate a problem.
Q: What is the temperature rating of this thermostat?
A: This thermostat is rated to open at 160°F (71°C), which is the standard specification for the listed engine applications.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy