Upper Exhaust Bellows – Fits MerCruiser 3.0-8.2L (Replaces 70981A3)

Upper Exhaust Bellows – Fits MerCruiser 3.0-8.2L (Replaces 70981A3)

This upper exhaust bellows is designed for a wide range of MerCruiser engines, from 3.0L models to Big Block V8s. It provides a direct-fit replacement for applications using a 3-inch, 15-degree center-mounted riser connected to a 4-inch elbow.

It serves as a direct replacement for MerCruiser 70981A3, Sierra 18-2762, GLM 89070, and Mallory Marine 9-72808.

• Installation Type: Bolt-on with clamps for a secure fit.
• Connection Size: Connects a 3-inch riser to a 4-inch elbow.
• Material: Constructed from durable, reinforced rubber.

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 Upper Exhaust Bellows (Replaces 70981A3)
• 2 x Stainless Steel Clamps

Installation Guide

1. Ensure the engine is off and the exhaust system is cool to the touch.
2. Locate the old upper exhaust bellows connecting the riser and the elbow.
3. Loosen and remove the clamps securing the old bellows, then detach the bellows.
4. Thoroughly clean the mounting surfaces on both the 3-inch riser and 4-inch elbow.
5. Position the new bellows, ensuring it is properly seated on both ends.
6. Secure the bellows by tightening the new stainless steel clamps at each connection point until snug.

Troubleshooting & FAQ

Q: How do I know if this exhaust bellows will fit my MerCruiser engine?

A: This bellows fits a wide range of MerCruiser engines from 1980 and up, including V6, small block V8, and big block V8 models. It specifically connects 3-inch, 15-degree center-mounted risers to a 4-inch elbow. Please review the "Compatible Engine Models" table and cross-reference your engine model and year to confirm fitment.

Q: What are the signs my old exhaust bellows needs replacement?

A: Common signs of a failing exhaust bellows include visible cracks, brittleness, water leaking into the bilge area, or an unusually loud exhaust noise. Regular inspection for wear and tear is recommended.

Q: What is the difference between this part and the original MerCruiser 70981A3?

A: This is an aftermarket part designed to meet or exceed OEM specifications for fit and function. It is made from durable reinforced rubber and serves as a direct replacement for MerCruiser part 70981A3 and other listed aftermarket equivalents.

Q: OEM vs. Aftermarket?

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.