Exhaust Elbow Gasket Pair for OMC Stern Drive/Cobra 3.0L – Replaces 3850495, 908013
Exhaust Elbow Gasket Pair for OMC Stern Drive/Cobra 3.0L – Replaces 3850495, 908013 is backordered and will ship as soon as it is back in stock.
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Exhaust Elbow Gasket Pair for OMC Stern Drive/Cobra 3.0L – Replaces...
Exhaust Elbow Gasket Pair for OMC Stern Drive/Cobra 3.0L – Replaces 3850495, 908013 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Exhaust Elbow Gasket Pair seals the connection between the exhaust manifold and exhaust elbow on applicable marine engines. Catalog references identify this gasket for OMC stern drive/Cobra applications using the 3.0-liter engine and exhaust elbow reference 18-1922.
The gasket replaces OMC part number 908013 and Volvo Penta part number 3850495. It is supplied as a package of two gaskets.
- Designed for the manifold-to-exhaust-elbow joint.
- Replacement gasket for selected OMC and Volvo Penta marine applications.
- Package contains two exhaust elbow gaskets.
Part Number Matrix
Use the references below together with your engine and exhaust-elbow application to confirm compatibility before ordering.
| Brand | Part Number | Reference |
|---|---|---|
| OMC | 908013 | Replacement OEM reference |
| Volvo Penta | 3850495 | Replacement OEM reference |
| Sierra | 18-2875-1 | Exhaust elbow gasket; package of two |
| Sierra | 18-2875-1-9 | Catalog package/display variation |
| GLM | 33770 | Aftermarket catalog reference |
Engine & Model Compatibility
Fitment must be confirmed by engine year, model, exhaust elbow and original gasket number. The available catalog application identifies the following relationship; it does not establish compatibility with every engine using a 2.5L or 3.0L designation.
| Brand | Model / Drive | Engine | Years | Exhaust Elbow | OEM Reference |
|---|---|---|---|---|---|
| OMC | Stern Drive / Cobra | 3.0 Liter | 1991–1993 | 18-1922 | 908013 |
| Volvo Penta | Application varies by engine and exhaust assembly | Confirm by original gasket number | Confirm before ordering | Confirm before ordering | 3850495 |
Do not rely on horsepower, displacement or brand alone for fitment. Compare the removed gasket, bolt-hole pattern, exhaust passages and original part number with the information above.
Technical Specs
- Product Type
- Exhaust elbow gasket
- Connection
- Exhaust manifold to exhaust elbow
- Package Quantity
- 2 gaskets per package
- Installation
- Direct replacement when application and gasket pattern match
- Application
- Selected marine stern drive/Cobra exhaust systems
- Replacement References
- OMC 908013; Volvo Penta 3850495
What’s in the Box
- 2 x Exhaust elbow gasket
Installation Notes
- Allow the engine to cool completely and disconnect the battery before beginning service.
- Verify that the replacement gasket matches the original gasket, exhaust elbow and bolt-hole pattern.
- Remove the exhaust elbow from the manifold and retain the hardware for inspection.
- Remove all old gasket material and corrosion from both mating surfaces. The surfaces should be clean, dry and flat.
- Position the new gasket so the bolt holes and exhaust passages align correctly.
- Reinstall the exhaust elbow and tighten the fasteners in the sequence and to the torque specified by the engine service manual.
- Reconnect removed hoses and components, then reconnect the battery.
- Run the engine according to the service procedure and inspect the joint for exhaust or cooling-water leakage.
Troubleshooting & FAQ
What part numbers does this gasket replace?
The catalog references identify OMC 908013 and Volvo Penta 3850495 as replacement references. Confirm the number and gasket shape against your original part before installation.
Does the package contain one gasket or two?
This listing contains two exhaust elbow gaskets per package.
Will this fit every OMC or Volvo Penta 3.0L engine?
No. Displacement and brand alone do not establish fitment. The available catalog application specifically identifies an OMC stern drive/Cobra 3.0-liter application for 1991–1993 using exhaust elbow 18-1922. Check the original gasket and service information for other applications.
Should gasket sealant be used?
Install the gasket according to the engine or drive manufacturer's service manual. Do not apply sealant unless the service procedure specifically requires it.
Can I reuse the old fasteners?
Inspect all fasteners for corrosion, damaged threads or stretching. Replace damaged hardware and tighten the fasteners to the service-manual specification.
What are common signs of a failed exhaust elbow gasket?
Possible signs include exhaust or water leakage at the manifold-to-elbow joint, rust or residue around the joint, unusual exhaust odor, or overheating. Stop operation and inspect the assembly if leakage is observed.
Safety & Important Information
- Confirm the engine year, model, exhaust elbow and original gasket number before ordering.
- This is an aftermarket replacement gasket, not an original equipment component.
- Do not install a gasket that does not match the mating surfaces and exhaust passages.
- Professional installation is recommended if the exhaust assembly is corroded, damaged or difficult to access.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for servicing marine engines and drive systems.
- Application-Focused Information — Use the listed replacement references and application details to verify compatibility before purchase.
- Service-Ready Packaging — This listing includes two exhaust elbow gaskets for the stated application.
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