Exhaust Elbow Gasket (Restrictor) for MerCruiser V6/V8 Engines – Replaces 27-41813, 27-860233 and 27-863724
Exhaust Elbow Gasket (Restrictor) for MerCruiser V6/V8 Engines – Replaces 27-41813, 27-860233 and 27-863724 is backordered and will ship as soon as it is back in stock.
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Exhaust Elbow Gasket (Restrictor) for MerCruiser V6/V8 Engines – Re...
Exhaust Elbow Gasket (Restrictor) for MerCruiser V6/V8 Engines – Replaces 27-41813, 27-860233 and 27-863724 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket restrictor-style exhaust elbow gasket is designed for applicable MerCruiser V6 and V8 marine engines using a compatible center-riser exhaust arrangement. It installs between the exhaust manifold and riser or elbow to help seal the joint and regulate raw-water flow in systems that specify a restricted gasket.
The gasket replaces Mercury/MerCruiser OEM references 27-41813, 27-860233, and 27-863724. The corresponding Sierra aftermarket reference is 18-0897. Catalog information identifies this restrictor gasket for use with compatible risers such as Sierra 18-1976-2 and 18-1970-2.
- Restrictor-style exhaust elbow gasket for compatible wet-joint exhaust systems.
- Installs between the exhaust manifold and riser or elbow.
- Suitable only when the engine and exhaust components call for this gasket style.
- Verify the gasket shape, openings, riser application and part number before ordering.
Part Number Matrix
These references are provided for identification and interchange research. They do not replace confirmation of the complete exhaust-manifold and riser configuration.
| Brand | Part Number | Reference Type |
|---|---|---|
| Mercury/MerCruiser | 27-41813 | OEM replacement reference |
| Mercury/MerCruiser | 27-860233 | OEM replacement reference; restricted center-riser gasket |
| Mercury/MerCruiser | 27-863724 | OEM replacement reference |
| Sierra | 18-0897 | Aftermarket equivalent reference; restrictor gasket |
Engine & Model Compatibility
This gasket is associated with a range of MerCruiser V6 and V8 applications, but exact fitment depends on the exhaust manifold, riser or elbow design, gasket opening pattern and cooling configuration. Model, year and horsepower alone are not sufficient to confirm fitment.
| Brand | Application | Stroke | OEM Reference | Application Notes |
|---|---|---|---|---|
| MerCruiser | Applicable V6 and V8 marine engines | 4-Stroke gasoline marine engine | 27-41813, 27-860233, 27-863724 | Use only with a compatible wet-joint center-riser exhaust arrangement that specifies a restrictor gasket. |
Important: This listing does not establish fitment for every MerCruiser V6 or V8 engine, every production year, or every manifold and riser combination. Compare the removed gasket and verify the engine service-manual or parts-catalog requirement before installation.
Technical Specs
- Product Type
- Exhaust elbow gasket
- Gasket Style
- Restrictor
- Installation Location
- Between the exhaust manifold and riser or elbow
- Cooling Application
- Compatible raw-water wet-joint cooling systems that specify a restrictor gasket
- Primary Marine Application
- MerCruiser V6 and V8 engines with compatible exhaust hardware
- Aftermarket Reference
- Sierra 18-0897
- OEM Replacement References
- Mercury/MerCruiser 27-41813, 27-860233 and 27-863724
What’s in the Box
- 1 × Restrictor exhaust elbow gasket
Only the gasket is included. Riser, elbow, manifold, mounting hardware, sealants and other service parts are not included unless specifically stated in the order details.
Installation Notes
- Disconnect the battery and allow the engine to cool completely before beginning work.
- Close or drain the cooling system as required by the engine service manual.
- Disconnect hoses and any sensors attached to the exhaust elbow or riser.
- Remove the fasteners securing the riser or elbow to the exhaust manifold and carefully separate the components.
- Remove all old gasket material and corrosion from both mating surfaces. Do not damage or distort the sealing faces.
- Compare the new gasket with the removed gasket and confirm the bolt holes and water and exhaust passages are correctly aligned.
- Install the gasket in the orientation specified by the engine or exhaust-component service information.
- Reinstall the riser or elbow and tighten the fasteners in the specified sequence and to the manufacturer's torque specification.
- Reconnect hoses and sensors, restore the cooling system and inspect the assembly before starting the engine.
- Run the engine carefully and check for exhaust, water or cooling leaks around the joint.
Troubleshooting & FAQ
What does “restrictor” mean?
A restrictor gasket includes a restricted passage intended for exhaust systems and cooling configurations that require controlled water flow. Do not substitute an open gasket unless the engine and exhaust-manifold documentation specifically calls for it.
Will this fit every MerCruiser V6 or V8 engine?
No. MerCruiser V6 and V8 engines use different manifold, riser, elbow and gasket configurations. Confirm the OEM reference, gasket shape and complete exhaust arrangement before ordering.
Which OEM numbers does this gasket replace?
Catalog references identify Mercury/MerCruiser 27-41813, 27-860233 and 27-863724 as replacement references for this restrictor-style gasket.
Which risers are associated with this gasket?
Catalog information associates the gasket with compatible riser references including Sierra 18-1976-2 and 18-1970-2. Confirm the complete application before installation.
Is this gasket for a dry-joint exhaust system?
This listing is intended for compatible traditional wet-joint exhaust arrangements. Dry-joint systems may use a different gasket design; compare the original part and service documentation before purchase.
Do I need one gasket per engine bank?
Many V6 and V8 exhaust systems use one manifold-to-riser gasket per cylinder bank, but the required quantity depends on the specific exhaust arrangement. Confirm the quantity needed for your engine before ordering.
Is this an OEM component?
No. This is an aftermarket replacement gasket identified by the listed Mercury/MerCruiser OEM references and the Sierra 18-0897 aftermarket reference.
Safety & Important Info
- Verify the OEM reference, gasket profile, passage layout and exhaust-component application before purchase.
- Do not use a restrictor gasket where the engine or exhaust system requires an open gasket, and do not use an open gasket where a restrictor is specified.
- Allow the engine to cool before service and follow the manufacturer's torque and installation procedures.
- Professional installation is recommended when exhaust, cooling or manifold service procedures are unfamiliar.
About Sea Sierra
- Marine Parts Focus — We supply replacement parts for marine engines and exhaust systems.
- Application-Conscious Listings — Part-number and configuration details are provided to help customers verify compatibility.
- Aftermarket Value — Replacement components are offered as practical alternatives to original service parts.
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