Lower Exhaust Bellow – Fits OMC Cobra Stern Drive & Volvo Penta 2.3–5.8L Engines (Replaces 3852742)

Lower Exhaust Bellow – Fits OMC Cobra Stern Drive & Volvo Penta Engines (Replaces 3852742)

This lower exhaust bellow provides a direct replacement for a wide range of OMC Cobra and Volvo Penta stern drive engines. It is engineered from durable, marine-grade rubber to withstand the harsh marine environment and ensure a reliable, leak-free seal for your engine's exhaust system.

This component directly replaces multiple OEM and aftermarket part numbers, ensuring broad compatibility. It is designed to meet or exceed original equipment specifications for fit, form, and function, providing a dependable alternative to OEM parts.

• Material: Manufactured from high-strength, marine-grade rubber for longevity.
• Installation: Mounts in the lower exhaust position on the stern drive.
• Included: The package contains one lower exhaust bellow.

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.

Technical Specifications

Package Contents

• 1 x Lower Exhaust Bellow/Hose (Replaces 3852742)

Installation Guide

1. Safety First: Disconnect the battery and ensure the engine is cool before starting.
2. Access the Bellow: Trim the sterndrive unit up to provide access to the exhaust bellow area.
3. Remove Old Bellow: Loosen and remove the hose clamps securing the old bellow at both ends.
4. Inspect and Clean: Carefully pull the old bellow off. Clean the mounting surfaces on the transom and sterndrive.
5. Install New Bellow: Slide the new bellow into position, ensuring it is properly seated on both ends.
6. Secure Clamps: Fasten the new hose clamps securely. Do not overtighten.
7. Final Check: Lower the sterndrive and reconnect the battery. Check for exhaust leaks after starting the engine.

Troubleshooting & FAQ

How do I confirm this fits my engine? Verify your original part number against our cross-reference list. Additionally, check the compatible engine model tables to ensure your specific engine series and size are listed.

What are the signs of a failing exhaust bellow?
Common signs include visible cracks, splits, or perishing of the rubber. You may also notice water leaking into the bilge area or hear an unusual exhaust noise from the stern.

How often should I replace the exhaust bellow?
It is recommended to inspect exhaust bellows annually as part of regular maintenance and replace them every 3-5 years, or immediately if any signs of wear or damage are found.

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.