Marine Exhaust Bellows Assembly – Fits OMC & Volvo Penta 3.0L–8.2L (Replaces 3852741, 3863450)
Marine Exhaust Bellows Assembly – Fits OMC & Volvo Penta 3.0L–8.2L (Replaces 3852741, 3863450) 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
Marine Exhaust Bellows Assembly – Fits OMC & Volvo Penta 3.0L–8...
Product Details
This high-quality Marine Exhaust Bellows Assembly is engineered for a broad range of OMC and Volvo Penta stern drive engines from 1994 and newer, including 3.0L, 4.3L, 5.0L, 5.7L, 5.8L, 7.4L, 8.1L, and 8.2L models. It serves as a crucial lower exhaust coupler, ensuring a secure and leak-free connection in your marine engine's exhaust system.
This assembly provides a direct interchange for several OEM and aftermarket part numbers, including OMC 3852741, Volvo Penta 3863450, Sierra 18-2780-1, GLM 89222, and Mallory 9-72800, making it a versatile and reliable replacement part.
- Constructed from durable, high-grade elastomeric rubber for excellent sealing performance and longevity.
- Functions as a direct-fit lower exhaust hose coupler for simplified installation.
- The package includes two mounting clamps for a complete and secure installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 3852741 |
| Volvo Penta | 3863450 |
| Sierra | 18-2780-1 |
| GLM | 89222 |
| Mallory | 9-72800 |
| CEF | 500509K |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For OMC Engines: This bellows fits Cobra Stern Drive models manufactured from 1994 onwards.
For Volvo Penta Engines: Compatible with GL, GS, GI, GXI, OSI, GIL, FL, and FSI series from 1994 and newer, as well as select D3/MD/TMD/TAMD series engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC | Cobra Stern Drive | 3.0L–8.2L | 4-Stroke | 1994 and newer | 3852741 | Lower exhaust coupler |
| Volvo Penta | GL, GS, GI, GXI Series | 3.0L–8.2L | 4-Stroke | 1994 and newer | 3863450 | Lower exhaust coupler |
| Volvo Penta | OSI, GIL Series | 3.0L–8.2L | 4-Stroke | 1994 and newer | 3863450 | Lower exhaust coupler |
| Volvo Penta | FL, FSI Series | 3.0L–8.2L | 4-Stroke | 1994 and newer | 3863450 | Lower exhaust coupler |
| Volvo Penta | D3/MD/TMD/TAMD 22 | Various | 4-Stroke | 3863450 | According to Osculati source |
Technical Specs
- Product Type
- Marine Engine Exhaust Bellows/Hose Assembly
- Installation
- Engine system exhaust connector
- Connection
- Hose clamp connection (stainless steel clamps included with some models)
- Housing Material
- Rubber/elastomeric material
- Housing Color
- Black
- Dimensions
- Approx. 25 x 25 x 15 cm (packaging)
- Weight
- 1.76 ounces (50 grams)
- Fitting Type
- Exhaust hose coupler
- Warranty
- Standard manufacturer warranty (varies by brand)
- Other Technical Attributes
- Sealing performance with good elasticity
What’s in the Box
- 1 × Marine Engine Bellows Assembly (Replaces 3852741/3863450)
- 2 × Mounting Clamps
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery for safety.
- Gain clear access to the lower exhaust bellows area on the stern drive.
- Carefully loosen and remove the old hose clamps securing the existing bellows.
- Remove the old, worn bellows. You may need to gently pry it off if it has adhered to the fittings.
- Thoroughly clean the surfaces of the drive and exhaust pipe where the new bellows will mount.
- Slide the new bellows into position, ensuring it is properly seated on both ends.
- Position the new clamps over the bellows and tighten them securely for a leak-proof seal.
- Reconnect the battery, start the engine, and inspect for any signs of exhaust or water leaks.
Troubleshooting & FAQ
How do I know if this bellows will fit my engine?
This part fits OMC and Volvo Penta engines from 3.0L to 8.2L made in 1994 or later. To be certain, please compare your existing part number to those in the Part Number Matrix and check your model against the Engine & Model Compatibility table on this page.
What are the typical signs of a failing exhaust bellows?
Common signs include visible cracks, splits, or perishing rubber. You might also notice water leaking into the bilge area or hear an increase in exhaust noise coming from the engine compartment, indicating a leak.
How often should an exhaust bellows be replaced?
Replacement intervals depend on usage (freshwater vs. saltwater) and exposure. As a general guideline, inspect bellows annually and plan to replace them every 3-5 years or at the first sign of wear, damage, or brittleness.
Is there a difference in quality versus the OEM part?
This is an aftermarket part designed to meet or exceed original equipment manufacturer (OEM) specifications. It is made from comparable high-quality materials in an ISO 9002 certified facility to ensure reliable performance and durability.
Do you offer expedited shipping?
We ship worldwide quickly—typical transit is 5–15 days for standard delivery. Expedited shipping options and costs, where available for your location, will be presented at checkout.
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 for unused items in their original condition are accepted within our standard return window. For detailed instructions, please see our policy page or contact us directly.
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 part, not an original equipment manufacturer (OEM) component.
- Professional installation is highly recommended for all marine parts to ensure safety and proper performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — We offer free standard delivery to most regions with an average transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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.
