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Upper Exhaust Tube Bellows – Fits MerCruiser V6 & V8 (Replaces 32-44348001, 32-44348T)
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Upper Exhaust Tube Bellows – Fits MerCruiser V6 & V8 (Replaces 32-44348001, 32-44348T)
This upper exhaust tube bellows is designed for MerCruiser V6 & V8 engines with center-mounted risers, including 4.3L, 5.0L, 5.7L, and 7.4L models manufactured between 1987 and 1998.
It serves as a direct replacement for MerCruiser part numbers 32-44348001 and 32-44348T, ensuring a precise fit and reliable performance. This component connects the exhaust elbow to the exhaust tube.
- Material: Durable rubber construction for longevity.
- Installation: Simple clamp-on installation with included stainless steel hose clamps.
- Dimensions: 4" Inside Diameter.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| MerCruiser | 32-44348001 |
| MerCruiser | 32-44348T |
| Sierra | 18-2748 |
| GLM | 89120 |
| Mallory | 9072805 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| MerCruiser | V6 & V8 | 4-Stroke | 1987–1998 | 32-44348001, 32-44348T | Late model with center mounted risers |
| MerCruiser | 260 GM | 4-Stroke | 1987 | 32-44348001, 32-44348T | 0B525982 THRU 0B773304 |
| MerCruiser | 230 4 BBL. GM | 4-Stroke | 1987 | 32-44348001, 32-44348T | 0B525982 THRU 0B773739 |
| MerCruiser | 200 2 BBL. GM | 4-Stroke | 1987 | 32-44348001, 32-44348T | 0B525982 THRU 0B774444 |
| MerCruiser | 350 MAG. ALPHA GM | 4-Stroke | 1987–1995 | 32-44348001, 32-44348T | 0B525982 THRU 0F600999 |
| MerCruiser | 5.7L GM | 4-Stroke | 1988–1995 | 32-44348001, 32-44348T | 0B525982 THRU 0F600999 |
| MerCruiser | 7.4L BRAVO GM 454 | 4-Stroke | 1988–1991 | 32-44348001, 32-44348T | 0B771113 THRU 0D603117 |
| MerCruiser | 5.0LX 4 BBL. GM | 4-Stroke | 1988–1995 | 32-44348001, 32-44348T | 0B773740 THRU 0F600999 |
| MerCruiser | 5.0L 2 BBL. GM | 4-Stroke | 1988–1995 | 32-44348001, 32-44348T | 0B774445 THRU 0F600999 |
| MerCruiser | 350 MAG (SKI) GM | 4-Stroke | 1991–1996 | 32-44348001, 32-44348T | 0D505450 THRU 0K040399 |
| MerCruiser | D4.2L/220 IDI VM 254 | 4-Stroke | 1994–1998 | 32-44348001, 32-44348T | 0D554732 THRU 0M999999 |
| MerCruiser | 7.4L BRAVO GEN. V GM | 4-Stroke | 1992–1996 | 32-44348001, 32-44348T | 0D603118 THRU 0F800699 |
| MerCruiser | 4.3L (GEN II) 2 BBL. GM | 4-Stroke | 1992–1993 | 32-44348001, 32-44348T | 0D714107 THRU 0F000877 |
| MerCruiser | 4.3LX GEN II 4 BBL. GM | 4-Stroke | 1992–1993 | 32-44348001, 32-44348T | 0D714370 THRU 0F001219 |
| MerCruiser | 454 MAG. BRAVO GEN. V GM | 4-Stroke | 1992–1993 | 32-44348001, 32-44348T | 0D805069 THRU 0F304999 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Upper Exhaust Tube Bellows |
| Installation | Clamp-On |
| Fuel Type | Gasoline |
| Connection | Exhaust Elbow to Tube |
| Housing Material | Rubber |
| Housing Color | Black |
| Dimensions | 4" Inside Diameter |
| Fitting Type | Stainless Steel Hose Clamps |
| Warranty | 1 Year (Varies by Manufacturer) |
Package Contents
- 1 x Upper Exhaust Bellows (Replaces 32-44348001 / 32-44348T)
- 2 x Stainless Steel Hose Clamps
Installation Guide
Follow these general steps for installation. It is always recommended to consult your engine's service manual.
- Safety First: Disconnect the boat's battery and ensure the engine is cool before starting work.
- Access the Bellows: Locate the upper exhaust bellows, which connects the exhaust elbow to the exhaust tube. Access may require removing other components.
- Remove Old Bellows: Loosen and remove the hose clamps securing the old bellows. Carefully cut or pull the old bellows off the fittings.
- Clean Surfaces: Thoroughly clean the mounting surfaces on the exhaust elbow and tube to ensure a proper seal.
- Install New Bellows: Slide the new bellows into position. Ensure it is fully seated and properly aligned.
- Secure Clamps: Position the new stainless steel hose clamps over the bellows and tighten them securely. Do not overtighten.
- Final Check: Reconnect the battery. Start the engine and carefully check for any exhaust or water leaks around the new bellows.
Troubleshooting & FAQ
Q: How do I confirm this bellows will fit my MerCruiser engine?
A: This bellows is designed for MerCruiser V6 and V8 engines (4.3L, 5.0L, 5.7L, 7.4L) from 1987-1998, specifically models with center-mounted risers. The most reliable way to confirm fitment is to match your engine's model and serial number against our "Compatible Engine Models" table. You can also physically match your old part to the specifications provided, such as the 4-inch inside diameter.
Q: What are the signs that my exhaust bellows needs replacement?
A: Common signs of a failing bellows include visible cracks, splits, or perishing rubber. You may also notice an increase in exhaust noise, fumes in the engine bay, or water leaking into the bilge area, which can indicate a compromised seal. Regular visual inspection, especially during seasonal maintenance, is recommended.
Q: How often should I inspect or replace the exhaust bellows?
A: Inspection should be part of your annual service routine. There is no fixed replacement interval, as it depends on usage, operating environment (freshwater vs. saltwater), and exposure. Replace it immediately if you notice any signs of wear, damage, or leakage.
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.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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