Upper Exhaust Bellow – Fits OMC & Volvo Penta 4.3L-8.2L (Replaces 3852696, 913405)
Upper Exhaust Bellow – Fits OMC & Volvo Penta 4.3L-8.2L (Replaces 3852696, 913405) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Upper Exhaust Bellow – Fits OMC & Volvo Penta 4.3L-8.2L (Replac...
Upper Exhaust Bellow – Fits OMC & Volvo Penta 4.3L-8.2L (Replaces 3852696, 913405) is backordered and will ship as soon as it is back in stock.
Product Details
This Upper Exhaust Bellow is designed for OMC Cobra stern drives from 1986–1993 and Volvo Penta models including the AQ DPX, SX, and King Cobra series, accommodating engines from 4.3L to 8.2L. It serves as a crucial component in the transom assembly, ensuring a sealed exhaust path.
This part is a direct replacement for OMC part numbers 3852696 and 913405, and offers interchange with Mallory 9-72802, GLM 89224, and Sierra 18-2779.
- Constructed from high-grade, durable marine rubber for longevity.
- Designed for external installation on the transom assembly.
- Secures with standard hose clamp attachments for a reliable seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| OMC | 3852696 |
| Volvo Penta | 913405 |
| Mallory | 9-72802 |
| GLM | 89224 |
| Sierra | 18-2779 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
This exhaust bellow is confirmed to fit the following OMC Cobra models. Fitment for Volvo Penta models should be verified by part number (913405) as specific year ranges are not available.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC | Cobra 4.3L | 262 CID | 4-Stroke | 1986–1993 | 3852696 | Upper exhaust bellow |
| OMC | Cobra 5.0L | 305 CID | 4-Stroke | 1986–1993 | 3852696 | Upper exhaust bellow |
| OMC | Cobra 5.7L | 350 CID | 4-Stroke | 1986–1993 | 3852696 | Upper exhaust bellow |
| OMC | Cobra 5.8L | 351 CID | 4-Stroke | 1986–1993 | 3852696 | Upper exhaust bellow |
| OMC | King Cobra 7.4L | 454 CID | 4-Stroke | 1987–1993 | 3852696 | Upper exhaust bellow |
| OMC | King Cobra 7.5L | 460 CID | 4-Stroke | 1987–1993 | 3852696 | Upper exhaust bellow |
| OMC | Cobra 8.1L | 496 CID | 4-Stroke | 1986–1993 | 3852696 | Upper exhaust bellow |
| OMC | Cobra 8.2L | 502 CID | 4-Stroke | 1986–1993 | 3852696 | Upper exhaust bellow |
Technical Specs
- Product Type
- Upper Exhaust Bellow
- Installation
- External
- Material
- Marine-grade rubber
- Color
- Black
- Dimensions
- 3-1/2" × 3-1/2" (88.9 mm × 88.9 mm)
- Connection
- Hose clamp attachment
- Position
- Upper exhaust, transom assembly
- Replaces
- Original upper exhaust bellow
What’s in the Box
- 1 × Upper Exhaust Bellow (Replaces 3852696/913405)
Installation Notes
- Ensure the engine is off and the battery is disconnected before starting work.
- Gain access to the stern drive's transom assembly area where the exhaust bellow is located.
- Carefully loosen and remove the hose clamps securing the old bellow at both ends.
- Remove the old bellow. Clean the mounting surfaces on the transom and stern drive thoroughly.
- Position the new bellow and securely tighten the hose clamps to create a watertight seal.
- After installation, reconnect the battery and run the engine, checking carefully for any exhaust or water leaks around the new bellow.
Troubleshooting & FAQ
How do I know if this bellow will fit my specific engine model?
Verify your model and year against the compatibility table provided. This bellow is designed for OMC Cobra drives (1986–1993) and various Volvo Penta models. The most reliable method is to cross-reference your existing part number with the OEM numbers 3852696 or 913405.
What are the signs of a failing exhaust bellow?
Common signs of failure include visible cracks, splits, brittleness, or water leaking into the bilge from the transom area. A damaged bellow can allow exhaust fumes to enter the boat and can lead to water ingestion and catastrophic engine damage if not replaced promptly.
How often should I replace my exhaust bellow?
For preventative maintenance, it is recommended to inspect exhaust bellows annually for any signs of wear or damage. We suggest replacement every 3-5 years, depending on usage (saltwater vs. freshwater) and storage conditions.
Is a special tool required for installation?
No special proprietary tools are required. Installation can typically be completed using standard hand tools, such as a screwdriver or a socket wrench set for the hose clamps.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility and is batch-inspected for consistency and quality.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most orders; expedited options will appear at checkout if they are available for your location.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. Please see our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component. Brand names and part numbers are used for reference purposes only.
- Professional installation is recommended for safety and performance. Improper installation can lead to component failure and engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- 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
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