Transom Seal Bellows Kit – Fits Volvo Penta SX/DP & OMC Cobra Stern Drives (Replaces 3854127)

Transom Seal Bellows Kit – Fits Volvo Penta SX/DP & OMC Cobra Stern Drives (Replaces 3854127)

This transom seal bellows kit is designed for Volvo Penta SX and DP series stern drives (1994–2006) and OMC Cobra stern drives (1986–1993). It provides a comprehensive solution for replacing worn or damaged bellows, creating a watertight seal between the transom and the outdrive to prevent water intrusion and protect critical driveline components.

This kit is a direct replacement for Volvo Penta part numbers 22197130, 23075752, and 3841481, as well as OMC part numbers 3854127, 983973, and 987467.

• Engineered to meet or exceed OEM specifications for fit and performance.
• Constructed from durable, marine-grade rubber (CR material) to resist saltwater, oil, and abrasion.
• Includes high-quality SS316 stainless steel clamps and clips for secure, corrosion-resistant installation.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Volvo Penta

OMC (Johnson/Evinrude)

Technical Specifications

Package Contents

• 1 x U-Joint Bellows with Clamp (Replaces 3854127 / 3841481 / 22197130)
• 1 x Exhaust Bellows with Clamp (Replaces 3850426 / 914036 / 767724)
• 1 x Shift Cable Bellows (Replaces 911826)
• 1 x Seal with Gasket Kit (Replaces 508105)
• 1 x Gimbal Bearing (Replaces 3853807 / 983937)
• 2 x Hose Clamps and Clips (SS316 stainless steel)

Installation Guide

1. Safety First: Disconnect the boat's battery and secure the vessel on a trailer or lift. Place the sterndrive in the full "up" or "tilt" position.
2. Remove Old Components: Carefully detach and remove the old U-joint, exhaust, and shift cable bellows. This will likely require cutting the old clamps.
3. Extract Gimbal Bearing: Use a slide hammer or bearing puller to remove the old gimbal bearing from the transom assembly.
4. Clean Surfaces: Thoroughly clean all mounting surfaces on the bell housing and transom assembly. Remove any old sealant, rubber residue, or corrosion.
5. Install New Bearing: Drive the new gimbal bearing into place using a bearing driver or appropriate socket, ensuring it is properly aligned and seated.
6. Fit New Bellows: Install the new shift cable bellow first, followed by the exhaust and U-joint bellows. Apply a suitable marine adhesive/sealant to the mounting surfaces.
7. Secure Clamps: Position the new stainless steel clamps over the bellows and tighten them securely to create a watertight seal.
8. Final Checks: Once all components are installed, re-check all connections. Lower the drive and inspect for any leaks before launching the boat.

Troubleshooting & FAQ

How do I confirm this fits my engine?
This kit is specifically designed for Volvo Penta SX and DP series drives from 1994–2006 and OMC Cobra stern drives from 1986–1993. Crucially, it is not for models with a cone clutch. The best way to ensure compatibility is to cross-reference your existing part number with those listed in our cross-reference table (e.g., Volvo 3854127, OMC 983973).

What are the signs that my transom bellows need replacement?
Common signs of failure include visible cracks, splits, or perishing of the rubber bellows; water leaking into the boat's bilge area, especially when the drive is trimmed; or a stiff, noisy, or rough-feeling gimbal bearing when turning the wheel.

How often should I replace the bellows service kit?
As a critical preventative maintenance item, it is recommended to inspect your bellows annually for any signs of wear or damage. A full replacement is typically advised every 3-5 years, depending on usage (freshwater vs. saltwater) and storage conditions.

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.