2-Pack Exhaust Elbow Gaskets for OMC & Volvo Penta 2.5L/3.0L Stern Drives – Replaces 3850495, 908013
2-Pack Exhaust Elbow Gaskets for OMC & Volvo Penta 2.5L/3.0L Stern Drives – Replaces 3850495, 908013 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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2-Pack Exhaust Elbow Gaskets for OMC & Volvo Penta 2.5L/3.0L St...
2-Pack Exhaust Elbow Gaskets for OMC & Volvo Penta 2.5L/3.0L Stern Drives – Replaces 3850495, 908013 is backordered and will ship as soon as it is back in stock.
Product Details
This 2-pack of Exhaust Elbow Gaskets is designed to seal the joint between the exhaust manifold and elbow or riser on selected OMC and Volvo Penta stern-drive applications. It is intended for specific 2.5L and 3.0L engine applications, including compatible OMC Cobra and Volvo Penta stern/out-drive systems.
These aftermarket replacement gaskets correspond to reference numbers including Volvo Penta 3850495, OMC 908013, 0908013, 0778045 and 778045. They are also cross-referenced with Sierra 18-2875, 18-2875-1 and 18-2875-1-9, GLM 33770 and MerCruiser 802376.
- Two exhaust elbow gaskets per package.
- Designed for the manifold-to-elbow or manifold-to-riser joint.
- Suitable for selected OMC and Volvo Penta 2.5L and 3.0L applications.
- Use the original gasket, engine model and reference number to confirm fitment before ordering.
Part Number Matrix
The following numbers are reference and interchange identifiers associated with this gasket design. Always verify the complete application before installation.
| Reference Type | Part Number |
|---|---|
| Volvo Penta reference | 3850495 |
| OMC reference | 908013, 0908013, 0778045, 778045 |
| Sierra reference | 18-2875, 18-2875-1, 18-2875-1-9 |
| GLM reference | 33770 |
| MerCruiser reference | 802376 |
Engine & Model Compatibility
Company fitment information identifies this gasket for elbow-joint applications on selected OMC and Volvo Penta stern/out-drive systems using 2.5L and 3.0L engines. The listed engine ratings include 120, 140 and 165 CV applications where the gasket reference and exhaust configuration match.
| Brand | Application | Engine Size | Rated Output Reference |
|---|---|---|---|
| OMC | Cobra stern drive / out drive | 2.5L or 3.0L | Selected 120, 140 and 165 CV applications |
| Volvo Penta | Stern drive / out drive | 2.5L or 3.0L | Selected 120, 140 and 165 CV applications |
Fitment can vary by engine year, model designation, exhaust elbow or riser design and serial-number range. Confirm the reference number and gasket shape against the part being replaced before installation.
Technical Specs
- Product Type
- Exhaust elbow gasket
- Application
- Exhaust manifold to elbow or riser joint
- Compatible Brands
- Selected OMC and Volvo Penta stern/out-drive applications
- Engine Applications
- Selected 2.5L and 3.0L applications
- Package Quantity
- 2 gaskets per package
- Product Status
- Aftermarket replacement; not an OEM-branded component
What’s in the Box
- 2 x Exhaust Elbow Gaskets
Installation Notes
- Allow the engine and exhaust system to cool completely before beginning work. Disconnect the battery.
- Follow the engine or sterndrive service manual for water-intake, cooling-system and exhaust-system precautions.
- Remove the exhaust hose or other components attached to the elbow or riser as required for access.
- Unbolt and remove the elbow or riser from the exhaust manifold.
- Clean both mating surfaces thoroughly. Remove the old gasket, corrosion and debris without damaging the sealing surfaces.
- Place one new gasket between the manifold and elbow or riser, aligning all bolt holes and passages.
- Reinstall the elbow or riser and tighten the fasteners in the correct sequence using the engine manufacturer’s specified torque.
- Reconnect the exhaust hose and any removed components.
- Reconnect the battery, operate the engine according to the service manual and inspect the joint for exhaust or water leaks.
Troubleshooting & FAQ
How do I confirm this gasket fits my engine?
Compare the reference number on your original gasket or service documentation with the numbers listed above. Confirm that your engine is a compatible OMC or Volvo Penta 2.5L or 3.0L stern/out-drive application and compare the gasket shape and bolt-hole layout before ordering.
Is this gasket for the manifold-to-elbow connection?
Yes. This gasket is intended for the exhaust manifold-to-elbow or manifold-to-riser joint on compatible applications. It is not a universal gasket for every marine exhaust configuration.
Should I use sealant with this gasket?
Install the gasket according to the applicable engine manufacturer’s service instructions. Do not apply sealant unless the service manual specifically requires it, because unsuitable sealant can affect alignment or sealing.
What are the signs of a failing exhaust elbow gasket?
Possible symptoms include water or exhaust leakage at the manifold-to-elbow joint, corrosion or staining around the connection, unusual exhaust steam or overheating. Inspect the complete exhaust system and follow the appropriate service procedure before replacing parts.
Is this a single gasket or a pair?
This product is sold as a package containing two exhaust elbow gaskets.
Is this an OEM gasket?
This is an aftermarket replacement gasket. The listed OEM and aftermarket numbers are provided as application references only; OMC, Volvo Penta, Sierra, GLM and MerCruiser are respective trademark owners.
Can I use this gasket for any 2.5L or 3.0L engine?
No. Engine displacement alone does not confirm fitment. Exhaust design, stern-drive model, engine year, serial range and gasket layout must also match. Verify the complete application and reference number before installation.
Safety & Important Info
- Work only on a cool engine and exhaust system, and follow the applicable service manual.
- Confirm the gasket shape, bolt-hole pattern and reference number before purchase.
- Do not rely on engine displacement alone to determine compatibility.
- Professional installation is recommended when removing or reinstalling marine exhaust components.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for maintenance and repair of marine systems.
- Application-Focused Information — Reference numbers and fitment details are provided to help match replacement parts to the original application.
- Practical Support — Compare your original component and service documentation before ordering or installing replacement parts.
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