Fit for Sierra 18-2746 Lower Exhaust Bellows for MerCruiser V6 V8 Engines - Replaces 32-14358T 32-14358001 89130

Marine Exhaust Bellows for MerCruiser V6 & V8 Engines

This is anlower exhaust bellows designed for MerCruiser V6 and V8 sterndrive engines. It functions as a direct replacement for Sierra part number 18-2746 and MerCruiser OEM part numbers 32-14358T, 32-14358001, and 89130. Manufactured from marine-grade rubber, this component is formulated to resist saltwater corrosion, UV degradation, and ozone. Its flexible, accordion-style wall construction accommodates engine movement and thermal expansion to maintain a secure seal.

• Fits: MerCruiser Alpha One (Gen 1 & 2) and Bravo (1, 2, 3) drive units
• Material: Marine-Grade Rubber with UV Inhibitors
• Package Includes: 1x Exhaust Bellows, 2x Clamps (1040*2)

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM andbrands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Lower Exhaust Bellows (Replaces Sierra 18-2746)
• 2 x Stainless Steel Clamps

Installation Guide

Professional installation is strongly recommended. The process requires specialized tools and knowledge of MerCruiser drive systems to ensure a proper seal and prevent engine damage.

1. Preparation: Disconnect the battery. Trim the sterndrive to the full up position and engage the trailer lock.
2. Remove Drive: Remove the main sterndrive unit to access the exhaust bellows.
3. Remove Old Bellows: Loosen and remove the clamps holding the old bellows to the bell housing and the gimbal housing.
4. Clean Surfaces: Thoroughly clean the mounting surfaces on both housings, removing any old adhesive or rubber residue.
5. Apply Adhesive: Apply a thin, even coat of marine-grade bellows adhesive to the cleaned mounting surfaces.
6. Install New Bellows: Using a bellows expander tool, carefully fit the new exhaust bellows into position.
7. Secure Clamps: Position the new clamps correctly and tighten them to the manufacturer's specified torque.
8. Reinstall Drive: Reinstall the sterndrive unit, ensuring all connections are secure.
9. Final Check: Lower the drive, reconnect the battery, and check for any exhaust or water leaks upon starting the engine.

Troubleshooting & FAQ

How do I confirm this part fits my engine?
First, check the Compatible Engine Models and Part Number Cross-Reference tables on this page. Second, visually compare the images and specifications to your old part. If you have a 1996-1997 model, it is critical to verify your specific configuration before ordering.

What are the signs of a failing exhaust bellows?
Common signs include visible cracks, splits, brittleness, or deformation in the rubber. You might also hear a louder exhaust sound or notice water leaking into the bilge area, which can cause severe engine damage if ignored.

How often should I replace the exhaust bellows?
For preventative maintenance, we recommend a thorough inspection annually. For optimal performance, replace the bellows every 2 years or 200 operating hours. The maximum service life is typically 3-5 years, depending heavily on usage conditions (saltwater vs. freshwater) and UV exposure.

OEM vs. Aftermarket?
This listing is anreplacement 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 anreplacement 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.