Exhaust Elbow Gasket for Volvo Penta & OMC Cobra – 240 HP Ford 302/351 CID
Exhaust Elbow Gasket for Volvo Penta & OMC Cobra – 240 HP Ford 302/351 CID is backordered and will ship as soon as it is back in stock.
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Exhaust Elbow Gasket for Volvo Penta & OMC Cobra – 240 HP Ford ...
Exhaust Elbow Gasket for Volvo Penta & OMC Cobra – 240 HP Ford 302/351 CID is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket exhaust elbow gasket is designed for specified Volvo Penta stern/out-drive and OMC Cobra stern/out-drive applications using 240 HP Ford 302 and 351 CID engines. It seals the joint between the exhaust manifold and elbow to help prevent exhaust and cooling-water leaks when the components are correctly matched.
The gasket is listed for replacement of or cross-reference to several Volvo Penta and OMC part numbers, including 3850496, 3863191, 0351325, 0765602, 0778055, 0909217, 0909786, 351325, and 913784. Aftermarket reference numbers include Sierra 18-0943-1, 18-0943-2, and 18-4431. MerCruiser OEM reference 878995 is also listed in the product record.
- Exhaust elbow gasket for marine stern-drive and out-drive exhaust systems.
- Specified application: Volvo Penta and OMC Cobra, 240 HP Ford 302/351 CID engines.
- Single replacement gasket for servicing one exhaust elbow-to-manifold joint.
- Always compare the original gasket, bolt-hole layout, and part number before ordering.
Part Number References
These numbers are listed as OEM, legacy, or aftermarket references for this gasket. Verify the application and physical configuration for your engine before installation.
| Reference group | Part numbers |
|---|---|
| Volvo Penta / OMC references | 3850496, 3863191, 0351325, 0765602, 0778055, 0909217, 0909786, 351325, 913784 |
| Aftermarket references | Sierra 18-0943-1, 18-0943-2, 18-4431 |
| Additional listed OEM reference | MerCruiser 878995 |
Engine and Model Compatibility
The company fitment record specifies the following application. The 240 HP rating and Ford engine-family information should be treated as a combined fitment condition rather than as independent specifications.
| Drive or engine brand | Application | Rated HP | Engine family |
|---|---|---|---|
| Volvo Penta | Stern / out-drive | 240 HP | Ford 302 CID and 351 CID |
| OMC Cobra | Stern / out-drive | 240 HP | Ford 302 CID and 351 CID |
This page does not confirm fitment for other horsepower ratings, engine families, years, serial-number ranges, inboard applications, or unrelated Volvo Penta and OMC models. Confirm the original part number and gasket shape before purchase.
Technical Specifications
- Product Type
- Exhaust elbow gasket
- Application
- Volvo Penta and OMC Cobra stern/out-drive exhaust systems
- Specified Engine Application
- 240 HP Ford 302 CID and 351 CID engines
- Installation
- Replacement gasket installed between the exhaust manifold and elbow
- Package Quantity
- 1 gasket
- Part Configuration
- Match the replacement gasket to the removed gasket and existing bolt-hole pattern before installation
- Part Status
- Aftermarket replacement
What’s in the Box
- 1 x Exhaust elbow gasket
Installation Notes
- Allow the engine and exhaust components to cool completely before beginning work.
- Disconnect the battery and follow the safety procedures in the applicable service manual.
- If required by the service manual, drain coolant from the exhaust manifold or cooling passages before removing the elbow.
- Remove the bolts securing the exhaust elbow and carefully separate the components.
- Remove the old gasket and clean both mating surfaces. Do not use tools or solvents that can damage the sealing surfaces.
- Compare the new gasket with the old gasket and confirm that all openings and bolt holes align.
- Install the gasket and exhaust elbow, then tighten the fasteners in the recommended sequence and to the manufacturer’s specified torque.
- Reconnect hoses and refill coolant if it was drained.
- Start the engine after reassembly and inspect the joint for exhaust, water, or coolant leaks.
Troubleshooting and FAQ
How do I confirm that this gasket fits my engine?
Confirm all of the fitment conditions together: Volvo Penta or OMC Cobra stern/out-drive, 240 HP rating, and Ford 302 or 351 CID engine. Then compare your original gasket and its part number with the references listed on this page. If the bolt-hole layout or gasket openings differ, do not install the part.
Is this gasket for a manifold or an exhaust elbow?
This product is an exhaust elbow gasket. It is used at the joint between the exhaust manifold and elbow. Manifold-to-cylinder-head gaskets and other exhaust seals are different parts and are not included.
How many gaskets are included?
The product record for this item specifies one gasket. It is not the two-gasket version or a complete manifold gasket repair kit.
Can I reuse the old gasket?
No. Exhaust gaskets are normally single-use sealing components. Replace the gasket whenever the exhaust elbow and manifold are separated, and inspect both mating surfaces for corrosion or damage.
What are common signs of an exhaust elbow gasket leak?
Possible signs include water or coolant leakage at the joint, exhaust odor or noise in the engine compartment, soot or rust staining, and abnormal engine temperature. Stop operation and investigate promptly if a leak is suspected.
Is this an OEM gasket?
This is an aftermarket replacement gasket. The OEM and aftermarket numbers shown above are reference numbers for identification and compatibility checking; the gasket is not sold as a genuine Volvo Penta or OMC component.
Safety and Important Information
- Verify the engine brand, drive type, horsepower, engine family, original part number, and physical gasket configuration before ordering.
- Do not rely on horsepower alone to determine compatibility.
- Use the manufacturer’s service information for torque specifications and coolant-draining procedures.
- Professional installation is recommended if the exhaust system is corroded or access is limited.
About Sea Sierra
- Marine replacement parts — We supply aftermarket components for repair and maintenance of marine engines and drive systems.
- Application-focused listings — Product information is organized around engine, drive, and part-number verification.
- Service-ready support — Compare your existing component and contact support if the part configuration does not match.
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