Aftermarket 3-Inch I.D. Exhaust Tube for MerCruiser Sterndrives – Replaces 32-90949 / 32-90949T
Aftermarket 3-Inch I.D. Exhaust Tube for MerCruiser Sterndrives – Replaces 32-90949 / 32-90949T is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Aftermarket 3-Inch I.D. Exhaust Tube for MerCruiser Sterndrives – R...
Aftermarket 3-Inch I.D. Exhaust Tube for MerCruiser Sterndrives – Replaces 32-90949 / 32-90949T is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 3-inch I.D. exhaust tube is intended for selected MerCruiser sterndrive exhaust applications. It provides the flexible exhaust connection between the relevant exhaust components and is commonly identified in marine parts catalogs as an exhaust tube or exhaust bellow.
The tube replaces MerCruiser references 32-90949 and 32-90949T. Sierra catalog information identifies the corresponding aftermarket reference as 18-2761.
- 3-inch inside diameter for the matching exhaust connection.
- Flexible exhaust-system replacement for selected MerCruiser sterndrive applications.
- Verify the existing tube, inside diameter, drive configuration, and part-number reference before ordering.
Part Number Matrix
These references identify the same replacement application or provide a catalog cross-reference. They are not the internal product SKU.
| Brand | Part Number | Reference Type |
|---|---|---|
| MerCruiser | 32-90949 / 32-90949T | OEM reference numbers |
| Sierra | 18-2761 | Aftermarket cross-reference |
Engine & Model Compatibility
Catalog evidence confirms this part-number family as a 3-inch I.D. MerCruiser exhaust tube. The available references do not establish a reliable horsepower-and-year compatibility list for every engine model, so the former broad 185–898 HP and 1982–1987 claims have been removed.
Before purchase, compare the original part number and physical tube dimensions. Confirm the complete sterndrive model, engine configuration, serial-number range where applicable, and the exhaust connection location against a current parts catalog or service manual.
| Application | Dimension | OEM Reference | Aftermarket Reference |
|---|---|---|---|
| Selected MerCruiser sterndrive exhaust applications | 3-inch I.D. | 32-90949 / 32-90949T | Sierra 18-2761 |
Technical Specs
- Product Type
- Exhaust tube, also cataloged as an exhaust bellow
- Application
- Selected MerCruiser sterndrive exhaust systems
- Inside Diameter
- 3 inches
- OEM Reference
- 32-90949 / 32-90949T
- Aftermarket Reference
- Sierra 18-2761
- Installation Type
- Flexible exhaust-tube connection secured to the vehicle's matching exhaust fittings
What’s in the Box
- 1 x 3-inch I.D. exhaust tube
Clamps are not listed as included. Reuse suitable serviceable clamps only if appropriate, or obtain the correct clamps separately for the specific installation.
Installation Notes
- Allow the engine and exhaust components to cool completely before beginning work, and follow the boat manufacturer's safety procedures.
- Confirm that the replacement tube matches the original part number and has the required 3-inch inside diameter.
- Remove any necessary surrounding components to access the exhaust tube and its clamps or retainers.
- Loosen the existing clamps and carefully remove the old tube without damaging the mating exhaust fittings.
- Inspect and clean the mating surfaces. Replace damaged clamps or fittings before installing the replacement tube.
- Position the new tube fully over the correct fittings. Ensure it is seated evenly and is not twisted, kinked, or pinched.
- Install and tighten suitable clamps according to the manufacturer's service instructions. Do not overtighten and damage the tube.
- After reassembly, inspect for exhaust leakage and verify proper operation before returning the boat to service.
Consult a qualified marine technician if the exhaust layout, drive configuration, or required clamp arrangement differs from the original installation.
Troubleshooting & FAQ
What part numbers does this exhaust tube replace?
The documented MerCruiser reference numbers are 32-90949 and 32-90949T. The corresponding Sierra aftermarket reference is 18-2761.
What is the inside diameter?
The cataloged inside diameter is 3 inches. Measure the original tube and mating fittings before ordering.
Does this listing fit every MerCruiser engine?
No universal engine-model or horsepower claim should be assumed. This is a part-number and dimensional match for selected MerCruiser sterndrive exhaust applications. Verify the complete model, serial range, exhaust position, and original part number for your installation.
Are clamps included?
Clamps are not listed as included with this exhaust tube. Confirm the required clamp size and quantity for your particular installation and purchase them separately when necessary.
What are common signs that the exhaust tube needs replacement?
Inspect for cracking, splitting, hardening, deformation, loose connections, visible exhaust leakage, or deterioration around the clamp areas. Replace the tube if damage or loss of a reliable seal is found.
Is this an OEM part?
This listing is for an aftermarket replacement. The MerCruiser numbers are provided as OEM reference numbers for identification and cross-reference purposes.
Shipping speed & cost
Shipping options and delivery estimates are shown at checkout based on the destination and service selected.
Warranty & returns
See the current store warranty and returns policy for applicable coverage, eligibility, and return instructions.
Safety & Important Info
- Verify the original part number, 3-inch inside diameter, physical dimensions, and exhaust connection location before purchase.
- Do not rely on horsepower or model-year alone to confirm fitment; serial-number and sterndrive configuration may also be required.
- This is an aftermarket replacement, not an OEM component.
- Professional marine installation is recommended when access is difficult or the exhaust configuration is uncertain.
About Sea Sierra
- Marine Replacement Parts — Parts are selected for common marine repair and replacement applications.
- Clear Cross-Reference Information — OEM reference numbers are provided to help match the correct replacement.
- Installation-Focused Support — Always verify dimensions, configuration, and required installation hardware before ordering.
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