MerCruiser Exhaust Elbow Gasket – Fits V6 and V8 Wet-Joint Applications, Replaces 27-41813, 27-860233
MerCruiser Exhaust Elbow Gasket – Fits V6 and V8 Wet-Joint Applications, Replaces 27-41813, 27-860233 is backordered and will ship as soon as it is back in stock.
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MerCruiser Exhaust Elbow Gasket – Fits V6 and V8 Wet-Joint Applicat...
MerCruiser Exhaust Elbow Gasket – Fits V6 and V8 Wet-Joint Applications, Replaces 27-41813, 27-860233 is backordered and will ship as soon as it is back in stock.
Product Details
This is a high-quality aftermarket MerCruiser exhaust elbow gasket for the joint between the exhaust manifold and riser/elbow. It is sold individually and is designed for applicable MerCruiser stern-drive and inboard gasoline engines using the specified exhaust-manifold and elbow configuration.
The gasket is listed for MerCruiser wet-joint applications covering V6 engines using GM 229/262 CID, V8 small-block engines using GM 305/350/377 CID, and V8 big-block engines using GM 454/502 CID. The company fitment information also lists it as a dry-joint alternative for applicable GM V6/V8 small-block applications. Always compare the existing gasket and exhaust-joint configuration before ordering.
Listed manufacturer and aftermarket references include Mercury/MerCruiser 27-41813, 27-860233 and 27-863724, plus Sierra 18-0897, GLM 30240 and Mallory 9-61413. These numbers are reference identifiers; confirm the complete engine, manifold, riser and joint configuration for your application.
- Installation Location: Between the exhaust manifold and the riser/elbow.
- Part Type: Exhaust elbow, riser or manifold-to-elbow gasket.
- Cooling Applications: Listed for raw-water-cooled exhaust-manifold applications.
- Product Format: Single gasket, sold individually.
Part Number Matrix
Use the following references to compare the gasket with your existing part and service-manual information.
| Brand or Source | Listed Part Number |
|---|---|
| Mercury/MerCruiser | 27-41813 |
| Mercury/MerCruiser | 27-860233 |
| Mercury/MerCruiser | 27-863724 |
| Mercury/MerCruiser | 27-863724Q |
| Mercury/MerCruiser | 863724B |
| Mercury/MerCruiser | 863724Q |
| Mercury/MerCruiser | 863724 |
| Sierra | 18-0897 |
| GLM | 30240 |
| Mallory | 9-61413 |
| OMC | 0508716 |
Engine & Model Compatibility
These application groups are taken from the listed product fitment. Model, serial-number, manifold style and joint type must be checked together.
| Brand | Model or Engine Group | Engine Details | Joint Type | Cooling | Reference | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 175–205 V6 | GM 229/262 CID | Wet joint | Raw-water application | 27-863724; 27-41813; 27-860233 | Applicable exhaust manifold-to-elbow gasket configuration |
| MerCruiser | 200–320 V8 small-block | GM 305/350/377 CID | Wet joint | Raw-water application | 27-863724; 27-41813; 27-860233 | Verify manifold and riser configuration |
| MerCruiser | 330–370 V8 big-block | GM 454/502 CID | Wet joint | Raw-water application | 27-863724; 27-41813; 27-860233 | Verify manifold and riser configuration |
| MerCruiser | GM V6/V8 small-block | Applicable listed applications | Dry-joint alternative | Confirm system design | 27-863724 family | Use only when the dry-joint configuration matches the gasket design |
Technical Specs
- Product Type
- Exhaust elbow, riser or manifold-to-elbow gasket
- Installation
- Between exhaust manifold and riser/elbow
- Application
- Applicable MerCruiser stern-drive and inboard gasoline engines
- Engine Groups
- GM 229/262 CID V6; GM 305/350/377 CID V8 small-block; GM 454/502 CID V8 big-block
- Joint Applications
- Listed wet-joint applications and a dry-joint alternative for applicable GM V6/V8 small-block configurations
- Cooling Application
- Listed for raw-water-cooled exhaust-manifold applications
- Quantity
- 1 gasket
- Installation Reference
- Mercury/MerCruiser 27-41813, 27-860233 and 27-863724; Sierra 18-0897
What’s in the Box
- 1 x Exhaust Elbow Gasket
Installation Notes
- Ensure the engine is completely cool and disconnect the battery before starting.
- Close or drain the cooling system as required by the service procedure so coolant or raw water will not enter the work area.
- Remove the exhaust elbow or riser from the manifold and retain the bolts and hardware.
- Thoroughly clean both mating surfaces. Remove old gasket material, corrosion and debris without damaging the sealing faces.
- Place the new gasket in the correct orientation, aligning the bolt holes and water passages with the manifold and elbow.
- Reinstall the elbow or riser and tighten the fasteners in the correct sequence and to the torque specified by the engine or service-manual instructions.
- Restore the cooling system, reconnect the battery, start the engine and inspect the joint for leaks after installation.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
Confirm that your engine is within one of the listed MerCruiser application groups: GM 229/262 CID V6, GM 305/350/377 CID V8 small-block, or GM 454/502 CID V8 big-block. Also verify the manifold, riser/elbow, joint style and cooling arrangement. Engine model or horsepower alone is not sufficient to confirm fitment.
Is this a complete gasket kit?
No. This listing is for one exhaust elbow gasket sold individually. It does not include manifold gaskets, additional elbow gaskets, O-rings, bolts, risers or other repair-kit components.
Is this gasket for wet-joint or dry-joint exhaust?
The listed applications primarily cover wet-joint exhaust manifolds, and the company fitment information also identifies a dry-joint alternative for applicable GM V6/V8 small-block configurations. Confirm the actual joint design and compare the original gasket before installation.
Do I need to use sealant with this gasket?
Do not apply sealant unless the engine manufacturer or service manual specifically requires it. Install the gasket on clean, dry mating surfaces and keep sealant away from coolant and raw-water passages.
What are the signs of a failing exhaust elbow gasket?
Possible signs include water or coolant leakage at the manifold-to-elbow joint, rust trails, exhaust leakage, water contamination of the engine oil, or overheating. Inspect the mating surfaces and surrounding components before replacing the gasket.
Is this an OEM component?
This listing is for an aftermarket replacement gasket. The displayed Mercury/MerCruiser, Sierra, GLM, Mallory and OMC numbers are manufacturer or aftermarket reference numbers used for comparison and identification.
What should I verify before ordering?
Verify the complete engine model, serial-number range, manifold and riser/elbow configuration, joint style, cooling system and original gasket shape. The same engine family can use different gasket designs depending on the exhaust components installed.
Safety & Important Info
- Work only on a fully cooled engine and follow the applicable marine service-manual procedure.
- Verify the gasket shape, openings and mating configuration against the original part before installation.
- Do not treat a reference number alone as confirmation of fitment; keep model, engine details, joint type and cooling arrangement together.
- Professional installation is recommended when removing exhaust manifolds or risers.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — Replacement components for selected stern-drive and inboard applications.
- Application-Focused Listings — Product information is organized around engine, manifold, riser and cooling-system compatibility.
- Value-Oriented Solutions — Aftermarket replacement parts for routine marine maintenance and repair.
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