Exhaust Elbow Gasket – Fits MerCruiser V6/V8 (Replaces 27-41813, 27-860233)
Exhaust Elbow Gasket – Fits MerCruiser V6/V8 (Replaces 27-41813, 27-860233) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Free standard shipping on all orders under 1 KG
Exhaust Elbow Gasket – Fits MerCruiser V6/V8 (Replaces 27-41813, 27...
Product Details
This is a high-quality aftermarket MerCruiser Exhaust Elbow Gasket 27-863724, designed as a standard cooling restrictor gasket. It is engineered to fit a wide range of MerCruiser V6 and V8 stern drive and inboard engines from 1981–1997 that are equipped with center rise outlet exhaust manifolds. It provides a reliable seal and ensures correct exhaust flow to maintain cooling system performance.
This part directly interchanges with several OEM and aftermarket part numbers, including Mercury/MerCruiser 27-41813, 27-860233, and Sierra 18-0897 among others.
- Installation Location: Mounts between the exhaust manifold and the riser/elbow.
- Cooling Type: Standard restrictor gasket design for raw water cooled systems.
- Engine Compatibility: Fits gasoline-powered MerCruiser V6 and V8 engines (1981–1997).
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 27-41813 |
| Mercury/MerCruiser | 27-860233 |
| Mercury/MerCruiser | 27-863724 |
| Sierra | 18-0897 |
| Barr | MC 20 99208 |
| Barr | MC47-27-41813 |
| GLM | 30240 |
| Osco | 8503-GR |
| Mallory | 9-61413 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | V6 4.3L | 175-205 | 4-Stroke | 1983–1997 | 27-863724 | Center rise outlet exhaust manifold |
| MerCruiser | 262 MAG | 175-205 | 4-Stroke | 1983–1997 | 27-863724 | Center rise outlet exhaust manifold |
| MerCruiser | 5.0L | 195+ | 4-Stroke | 1981–1997 | 27-863724 | Center rise outlet exhaust manifold |
| MerCruiser | 5.7L | 220-260 | 4-Stroke | 1981–1997 | 27-863724 | Center rise outlet exhaust manifold |
| MerCruiser | 7.4L | 310-330 | 4-Stroke | 1981–1997 | 27-863724 | Center rise outlet exhaust manifold |
| MerCruiser | 8.2L | 380+ | 4-Stroke | 1981–1997 | 27-863724 | Center rise outlet exhaust manifold |
Technical Specs
- Product Type
- Exhaust Elbow Gasket
- Installation
- Between manifold and riser/elbow
- Fuel Type
- Gasoline
- Connection
- Center rise outlet exhaust manifold
- Housing Material
- Metal/Composite
- Dimensions
- Standard size for MerCruiser V6/V8 applications
- Gasket Type
- Restrictor (Standard Cooling)
- Quantity
- Pack of 1
- Cooling System
- Standard (allows raw water flow)
What’s in the Box
- 1 x Exhaust Elbow Gasket (27-863724)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery before starting.
- Drain the engine cooling system to a level below the exhaust manifolds.
- Carefully remove the exhaust elbow/riser from the manifold, setting aside bolts and hardware.
- Thoroughly clean both the manifold and riser mating surfaces. Remove all old gasket material and corrosion.
- Place the new gasket onto the manifold, ensuring proper alignment with the bolt holes and water passages.
- Reinstall the exhaust elbow/riser and tighten the bolts to the manufacturer's specified torque in the correct sequence.
- Reconnect the battery, refill the cooling system, and check for leaks after starting the engine.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
This gasket fits MerCruiser V6 and V8 engines (1981-1997) with a center rise outlet exhaust manifold. Verify your engine model and year against the compatibility table. The key is the "center rise" manifold configuration. When in doubt, compare our product images to your old gasket.
What is a "restrictor" gasket?
A restrictor gasket has smaller coolant passages compared to an open gasket. It is used in "standard" cooling systems to regulate water flow and ensure the engine maintains the correct operating temperature. Using the wrong type (open vs. restrictor) can lead to overheating or overcooling.
Will this work for a dry-joint exhaust?
No, this gasket is specifically for older "wet-joint" style center rise manifolds from 1981–1997. Dry-joint systems use a different type of seal and gasket.
Do I need to use sealant with this gasket?
Generally, it is not recommended to use sealant on this type of gasket as it can interfere with the seal or block coolant passages. Install it clean and dry on properly prepared surfaces. Always consult your service manual for specific instructions.
What are the signs of a failing exhaust elbow gasket?
Common signs include water leaking externally from the joint between the manifold and elbow, water in the engine oil (from an internal leak), or engine overheating. A visual inspection for rust trails or water drips is the first diagnostic step.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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