Upper Exhaust Bellow – Fits OMC Cobra & Volvo Penta 4.3L-8.2L (Replaces 3852696, 913405)

Upper Exhaust Bellow – Fits OMC Cobra & Volvo Penta 4.3L-8.2L (Replaces 3852696, 913405)

This upper exhaust bellow is designed for a precise fit on OMC Cobra stern drives (1986-1993) and Volvo Penta AQ DPX, SX, and King Cobra models. It accommodates a wide range of engine sizes from 4.3L to 8.2L, ensuring broad compatibility for many popular boats.

This part is a direct replacement for multiple OEM and aftermarket part numbers, including OMC 3852696, 913405; Mallory 9-72802; GLM 89224; and Sierra 18-2779, providing a reliable and cost-effective solution for your marine maintenance needs.

• Material: Constructed from high-grade, durable marine rubber to withstand harsh marine environments.
• Installation: Designed for external installation on the transom assembly with a secure hose clamp attachment.
• Package Includes: 1 × Upper 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.

OMC Cobra Models

Volvo Penta Models

Technical Specifications

Package Contents

• 1 × Upper Exhaust Bellow (Replaces OEM Part Numbers: 3852696, 913405)

Installation Guide

1. Ensure the engine is off, and the key is removed. Place the stern drive in the full upward tilt position for access.
2. Locate the upper exhaust bellow connected between the transom assembly and the stern drive.
3. Using a screwdriver or socket wrench, loosen and remove the hose clamps securing the old bellow at both ends.
4. Carefully pry the old bellow off the mounting flanges. Thoroughly clean any old adhesive, sealant, or debris from the surfaces.
5. Apply a suitable marine-grade adhesive to the mounting flanges if recommended for your model.
6. Position the new exhaust bellow, ensuring it is correctly aligned and fully seated on both the transom and drive ports.
7. Install and tighten the new hose clamps securely. Do not overtighten, as this can damage the rubber.
8. Lower the stern drive and visually inspect the bellow to confirm it is properly seated and not pinched or binding.

Troubleshooting & FAQ

Q: How do I confirm this bellow fits my engine?

A: This bellow is compatible with OMC Cobra stern drives manufactured between 1986 and 1993, as well as a range of Volvo Penta models. The most reliable method is to check the part number on your existing bellow. This product is a direct replacement for OEM parts 3852696 and 913405, and aftermarket parts Mallory 9-72802, GLM 89224, and Sierra 18-2779.

Q: What are the signs that my exhaust bellow needs replacement?

A: Common indicators of a failing exhaust bellow include visible cracks, splits, dry rot, or perishing of the rubber material. You might also notice an increase in exhaust noise from the stern or discover water leaking into the boat's bilge area, which can be a serious issue.

Q: How often should I replace the exhaust bellow?

A: For preventative maintenance, we recommend a thorough inspection of all bellows annually. Replacement is advised every 3-5 years, depending on usage and environmental conditions (e.g., saltwater vs. freshwater), or immediately if you notice any signs of wear or damage.

Q: Is this an OEM part or an aftermarket one?

A: 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.

Q: How fast do you ship and how much does it cost?

A: 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.

Q: What is your warranty and return policy?

A: 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.