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Bellows Kit – Fits OMC Cobra Sterndrive & Volvo Penta SX (Replaces 911826, 3854127, 3841481, 3850426)
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Bellows Kit – Fits OMC Cobra Sterndrive & Volvo Penta SX
This U-joint bellows kit is designed for OMC Cobra Sterndrive I/O models from 1986-1993. It is also a direct fit for equivalent Volvo Penta stern drives, including the SX-S, SX-C, SX-R, SX-M, and DP-S, DP-S1, DP-SM series.
This kit directly replaces OMC part numbers 911826, 3841481, and 3850426, as well as Volvo Penta part numbers 3854127 and 22197130.
- Installation Type: Direct OEM replacement that connects the transom to the drive.
- Function: Protects the U-joint assembly from water intrusion and corrosion.
- Kit Includes: Marine-grade rubber bellows with stainless steel clamps.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| OMC | 911826 |
| OMC | 3841481 |
| OMC | 3850426 |
| Volvo Penta | 3854127 |
| Volvo Penta | 22197130 |
Compatible Engine Models
Confirm your engine model/year in the table below.
OMC Cobra Sterndrive
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| OMC | Cobra Sterndrive I/O | Various | 4-Stroke | 1986-1993 | 911826/3841481/3850426 |
Volvo Penta
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Volvo Penta | SX-S | Various | 4-Stroke | 3854127/22197130 |
| Volvo Penta | SX-C | Various | 4-Stroke | 3854127/22197130 |
| Volvo Penta | SX-R | Various | 4-Stroke | 3854127/22197130 |
| Volvo Penta | SX-M | Various | 4-Stroke | 3854127/22197130 |
| Volvo Penta | DP-S | Various | 4-Stroke | 3854127/22197130 |
| Volvo Penta | DP-S1 | Various | 4-Stroke | 3854127/22197130 |
| Volvo Penta | DP-SM | Various | 4-Stroke | 3854127/22197130 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | U-Joint Bellows Kit |
| Installation | Direct OEM replacement |
| Connection | Transom to drive |
| Housing Material | Marine-grade rubber |
| Housing Color | Black |
| Fitting Type | Bellows with stainless steel clamps |
| Warranty | 1 Year |
| Other Technical Attributes | Protects U-joint connection at transom |
Package Contents
- 1 x Bellows Kit (Replaces 911826, 3854127, 3841481, 3850426)
Installation Guide
- Safety First: Before starting, disconnect the battery and ensure the sterndrive is trimmed up for access.
- Remove the Drive: Unbolt and carefully detach the sterndrive from the transom assembly.
- Access the Bellows: Locate the old U-joint bellows connected between the bell housing and the transom plate.
- Remove Old Bellows: Loosen and remove the stainless-steel clamps securing the old bellows at both ends.
- Clean Surfaces: Thoroughly clean the mounting surfaces on the bell housing and transom to ensure a proper seal.
- Install New Bellows: Position the new bellows, ensuring it is correctly oriented and seated.
- Secure Clamps: Install and tighten the new stainless-steel clamps to create a watertight seal. Do not overtighten.
- Reinstall Drive: Carefully reinstall the sterndrive, ensuring all connections are properly aligned and torqued to manufacturer specifications.
- Final Check: Lower the drive and check for leaks or binding before reconnecting the battery.
Troubleshooting & FAQ
How do I know if this bellows kit will fit my sterndrive?
This kit fits OMC Cobra Sterndrive models from 1986-1993 and a range of Volvo Penta SX and DP series drives. The best way to confirm fitment is to match your existing part number to one of the OEM cross-references listed: OMC (911826, 3841481, 3850426) or Volvo Penta (3854127, 22197130).
What are the signs that my U-joint bellows needs to be replaced?
Common signs of failure include visible cracks, tears, or perishing of the rubber. The most critical symptom is water entering the bellows, which can lead to catastrophic U-joint and gimbal bearing failure. Regular inspection during maintenance is crucial.
How often should a sterndrive bellows be replaced?
As a preventative maintenance item, U-joint bellows are typically replaced every 1-2 seasons, especially for boats used in saltwater. Always replace them if you notice any signs of wear, damage, or water intrusion, regardless of age.
OEM vs. Aftermarket?
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.
How fast do you ship and how much does it cost?
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.
What is your warranty and return policy?
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.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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