Exhaust Manifold Gasket for MerCruiser, OMC and Volvo Penta 3.0L/3.0LX 4-Cylinder Engines – Replaces 27-815528, 3853256
Exhaust Manifold Gasket for MerCruiser, OMC and Volvo Penta 3.0L/3.0LX 4-Cylinder Engines – Replaces 27-815528, 3853256 is backordered and will ship as soon as it is back in stock.
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Exhaust Manifold Gasket for MerCruiser, OMC and Volvo Penta 3.0L/3....
Exhaust Manifold Gasket for MerCruiser, OMC and Volvo Penta 3.0L/3.0LX 4-Cylinder Engines – Replaces 27-815528, 3853256 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Exhaust Manifold Gasket is designed for selected MerCruiser, OMC and Volvo Penta stern-drive applications using Chevrolet inline 4-cylinder engines, including MerCruiser 3.0L and 3.0LX models. It is supplied as a single gasket for the exhaust manifold connection.
The gasket is listed for MerCruiser 27-815528, Volvo Penta 3853256, OMC 914578 and OMC 0914578. It also cross-references to Sierra 18-0680, GLM 33580 and Mallory 9-61428.
- Single exhaust manifold gasket for a 4-cylinder marine engine application.
- Direct replacement design for the listed original-equipment references.
- Suitable for the specific engine models and application ranges shown below.
- Verify the engine model, year range and original gasket before ordering.
Part Number Matrix
The following references are associated with this exhaust manifold gasket. Number references do not replace application verification.
| Brand | Reference | Reference Type |
|---|---|---|
| MerCruiser | 27-815528 / 815528 | OEM reference |
| Volvo Penta | 3853256 | OEM reference |
| OMC | 914578 / 0914578 | OEM reference |
| OMC Stern Drive | 3853256 | Cross-reference |
| Sierra | 18-0680 | Aftermarket cross-reference |
| GLM | 33580 | Aftermarket cross-reference |
| Mallory | 9-61428 | Aftermarket cross-reference |
Engine & Model Compatibility
Confirm the complete engine model and application details before purchase. The listed conditions must match your engine together; a matching part number alone is not sufficient.
| Brand | Model or Application | Engine Description | Years | Related Reference | Notes |
|---|---|---|---|---|---|
| MerCruiser | Models 120/140 | Inline 4-cylinder, 153/181 CID | 1982–1995 | 27-815528 | Application listed by the company catalog. |
| MerCruiser | 3.0LX / 3.0L | GM 181 CID, inline 4-cylinder | 1990 and newer | 27-815528 | Includes the MCM 3.0LX and MCM 3.0L application ranges specified by the company. |
| MerCruiser | MCM 3.0LX | Inline 4-cylinder | 1990–1997 | 27-815528 | Specific model range listed by the company. |
| MerCruiser | MCM 3.0L | Inline 4-cylinder | 1998 and newer | 27-815528 | Specific model range listed by the company. |
| Volvo Penta | 3.0L applications | Application-specific 4-cylinder marine engine | Verify by engine model | 3853256 | Use the original gasket and engine model to confirm fit. |
| OMC Cobra | 3.0L applications | Application-specific 4-cylinder marine engine | Verify by engine model | 914578 / 0914578 | Use the original gasket and engine model to confirm fit. |
Technical Specifications
- Product Type
- Exhaust manifold gasket
- Quantity
- 1 gasket
- Application
- Selected marine stern-drive exhaust manifold applications
- Engine Configuration
- Inline 4-cylinder applications as listed above
- Installation
- Direct replacement; installation must follow the engine manufacturer's service procedures
- Brand Status
- Aftermarket replacement part
What's in the Box
- 1 x Exhaust Manifold Gasket
No additional manifold, riser gasket, O-ring or complete gasket repair kit is included with this single-gasket listing.
Installation Notes
- Allow the engine to cool completely, disconnect the battery and follow the manufacturer's safety procedures.
- Drain or isolate the cooling system as required by the engine service manual.
- Remove the exhaust manifold and discard the old gasket.
- Clean the cylinder-head and manifold mating surfaces carefully. Remove old gasket material, rust and debris without damaging the sealing surfaces.
- Position the new gasket in the correct orientation. Do not apply sealant unless the engine manufacturer's service manual specifically requires it.
- Reinstall the manifold and tighten the fasteners in the specified sequence and to the specified torque.
- Restore the cooling system, reconnect the battery and inspect for exhaust or coolant leaks after starting the engine.
Troubleshooting & FAQ
What are common signs of a failing exhaust manifold gasket?
Possible signs include an exhaust ticking or tapping noise, soot or carbon marks near the manifold joint, exhaust odor in the engine compartment, coolant leakage and reduced engine performance. Inspect the complete exhaust and cooling system before replacing the gasket.
Does this gasket fit both MerCruiser 3.0L and 3.0LX engines?
Yes, the company application data lists MCM 3.0L models from 1998 and newer and MCM 3.0LX models from 1990–1997. Earlier MerCruiser 120/140 inline 4-cylinder applications from 1982–1995 are also listed. Confirm your exact engine model and original gasket before ordering.
Is this a complete exhaust manifold gasket kit?
No. This listing is for one exhaust manifold gasket only. It does not include the additional gaskets, O-rings or other components found in separate manifold repair kits.
Should sealant be used during installation?
Install the gasket according to the engine manufacturer's service manual. Do not use sealant unless the manual specifically calls for an approved sealant and application method.
When should the gasket be replaced?
There is no universal replacement interval. Replace the gasket whenever the manifold is removed or when inspection shows leakage, damage or loss of sealing.
Is this an OEM gasket?
This is an aftermarket replacement gasket. MerCruiser, Volvo Penta and OMC references are provided for application identification and cross-reference purposes.
Fitment and Safety Information
- Verify the engine brand, model, year range, cylinder configuration and original gasket reference before purchase.
- Do not rely on a part number alone when several engine versions or exhaust configurations exist.
- Compare the replacement gasket's shape and openings with the removed gasket before installation.
- Use proper ventilation and follow all battery, fuel, cooling-system and hot-engine safety procedures during service.
- Professional installation is recommended when the required service procedure or torque specifications are unavailable.
About Sea Sierra
- Marine Replacement Parts — We supply application-focused replacement components for marine engines and stern drives.
- Application Clarity — Product information is organized around engine models, reference numbers and installation requirements.
- Practical Support — Compare your original component and confirm fitment details before ordering or installation.
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