32-90949T Exhaust Tube for Mercury MerCruiser 120 140 | JLM Marine

32-90949T Exhaust Tube for Mercury MerCruiser 120 140

This exhaust tube is designed specifically for Mercury MerCruiser 120 and 140 sterndrive engines featuring inline 4-cylinder configurations (153/181 CID). It provides a direct replacement solution for older model sterndrives manufactured between 1982 and 1995, ensuring proper exhaust routing and engine performance.

This aftermarket component directly replaces OEM part number 32-90949T, delivering reliable fitment and function for vintage MerCruiser sterndrive systems that require exhaust tube replacement due to wear, corrosion, or damage.

• Designed for Mercury MerCruiser 4-cylinder sterndrive engines (120/140 models)
• Fits 153 CID and 181 CID inline 4-cylinder configurations
• Compatible with models manufactured from 1982 to 1995

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. 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.

Technical Specifications

Package Contents

• 1 × Exhaust Tube (32-90949T)
• Same as the first picture shown

Installation Guide

1. Disconnect the battery and ensure the engine is completely cool before beginning work.
2. Remove the sterndrive unit according to your service manual to access the exhaust tube mounting area.
3. Disconnect any exhaust hoses or clamps securing the old exhaust tube. Note their positions for reinstallation.
4. Carefully remove the old exhaust tube from its mounting points, inspecting surrounding components for corrosion or damage.
5. Clean all mounting surfaces and mating areas thoroughly to ensure a proper seal with the new tube.
6. Position the new 32-90949T exhaust tube into place, aligning it with the mounting brackets and exhaust ports.
7. Secure the tube with appropriate fasteners, tightening to manufacturer specifications (refer to your service manual for torque values).
8. Reconnect all exhaust hoses and clamps, ensuring tight and secure connections to prevent leaks.
9. Reinstall the sterndrive unit, following reverse removal procedures and verifying proper alignment.
10. Reconnect the battery and perform a visual inspection of all connections before starting the engine.
11. Start the engine and check for exhaust leaks around the new tube and all connection points. Listen for unusual sounds.
12. If no leaks or issues are detected, perform a brief test run and monitor engine temperature and exhaust flow.

Troubleshooting & FAQ

Q: How do I confirm this exhaust tube fits my MerCruiser sterndrive?
A: Verify that your engine is a 120 or 140 model with an inline 4-cylinder configuration (153 or 181 CID) manufactured between 1982 and 1995. Cross-reference your original part number with 32-90949T to ensure compatibility.

Q: What are the signs that my exhaust tube needs replacement?
A: Common indicators include visible corrosion or rust, exhaust leaks (often detected by hissing sounds or soot marks), cracks in the tube material, or reduced engine performance due to improper exhaust flow.

Q: Can I install this exhaust tube myself or should I hire a professional?
A: While experienced DIY mechanics can perform this installation, it requires removing the sterndrive unit and working with exhaust system components. Professional installation is recommended to ensure proper alignment, sealing, and torque specifications are met.

Q: How often should I inspect or replace the exhaust tube?
A: Inspect your exhaust tube annually during routine maintenance, especially if your boat operates in saltwater. Replace it immediately if you notice any corrosion, leaks, or structural damage, as these can lead to engine performance issues or safety hazards.

Q: Is this an OEM part or an aftermarket replacement?
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.