Turbo Gasket – Fits Mercury/Mercruiser 2.8L & 4.2L Diesel Engines (Replaces 27-8M0094247, 898101475)
Turbo Gasket – Fits Mercury/Mercruiser 2.8L & 4.2L Diesel Engines (Replaces 27-8M0094247, 898101475) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Turbo Gasket – Fits Mercury/Mercruiser 2.8L & 4.2L Diesel Engin...
Product Details
This aftermarket Turbo Gasket provides a direct-fit seal for the turbocharger to exhaust elbow connection on a wide range of Mercury/Mercruiser diesel engines. It is designed for 2.8L (170-230 HP) and 4.2L (200-350 HP) models produced from the 1990s through 2013, ensuring reliable performance and preventing exhaust leaks.
It serves as a direct replacement for multiple part numbers, including Mercury 27-8M0094247, 898101475, 854129001, 854129, and 801333454.
- Installs as a direct factory replacement.
- Engineered for marine diesel applications.
- Functions as the OEM factory gasket for the turbocharger/exhaust elbow connection.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 27-8M0094247 |
| Mercury | 898101475/27-8M0094247 |
| Mercury | 854129001/898101475 |
| Mercury | 854129/801333454 |
| Mercury | 801333454/854129001 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for compatible Mercury and MerCruiser diesel engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 2.8L (EI 170) | 170 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 2.8L (EI 200) | 200 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 2.8L QSD (EI 170) | 170 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 2.8L QSD (EI 210) | 210 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 2.8L QSD (EI 220) | 220 | 4-Stroke | 1998–2012 | 27-8M0094247 | |
| MerCruiser | 2.8L QSD (EI 230) | 230 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 2.8LD (D-TRONIC) | 165 | 4-Stroke | 1997–1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (D-TRONIC) | 250 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (EI 250) | 250 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (EI 270) | 270 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (EI 300) | 300 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (EI 320) | 320 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (LD) | 200 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (MI 200) | 200 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L (MI 230) | 230 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L QSD (EI 270) | 270 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 4.2L QSD (EI 320) | 320 | 4-Stroke | 1998–2012 | 27-8M0094247 | |
| MerCruiser | 4.2L QSD (EI 350) | 350 | 4-Stroke | 1998–2013 | 27-8M0094247 | |
| MerCruiser | 530D | 530 | 4-Stroke | 1994–1995 | 27-8M0094247 | |
| MerCruiser | 636D | 636 | 4-Stroke | 1994–1997 | 27-8M0094247 | |
| MerCruiser | 642D | 642 | 4-Stroke | 1990–1998 | 27-8M0094247 | |
| MerCruiser | 642D (--) | 642 | 4-Stroke | 1998 | 27-8M0094247 | |
| MerCruiser | 642D (D-TRONIC) | 642 | 4-Stroke | 1998 | 27-8M0094247 |
Technical Specs
- Product Type
- Turbo Gasket
- Installation
- Direct replacement
- Fuel Type
- Diesel
- Dimensions
- 22.0" × 17.0" × 1.0"
- Weight
- 0.065 kg (0.14 lb)
- Other Technical Attributes
- OEM factory gasket for turbocharger/exhaust elbow connection
What’s in the Box
- 1 x GASKET (27-8M0094247)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery before starting work.
- Locate the turbocharger and the exhaust elbow connection where this gasket is situated.
- Carefully remove any heat shields or components obstructing access to the flange bolts.
- Loosen and remove the bolts or nuts securing the turbocharger to the exhaust elbow.
- Gently separate the components and remove the old gasket. Be careful not to damage the flange surfaces.
- Thoroughly clean both mating surfaces. Remove all old gasket material, rust, and debris for a proper seal.
- Position the new gasket correctly onto the studs or into place between the flanges.
- Reassemble the components, tightening the bolts in a star or crisscross pattern to the manufacturer's recommended torque specifications.
- Reinstall any heat shields or other components that were removed.
- Reconnect the battery, start the engine, and carefully check for any signs of exhaust leaks around the new gasket.
Troubleshooting & FAQ
How do I know if my turbo gasket is failing?
Common signs of a failing turbo gasket include a noticeable exhaust leak (hissing or ticking sound that increases with engine RPM), a smell of exhaust fumes in the engine bay or cabin, decreased engine performance or boost, and visible soot or carbon tracks around the turbo/exhaust elbow flange.
Is this gasket compatible with both the 2.8L and 4.2L QSD engines?
Yes, this gasket is specified for a wide range of MerCruiser diesel engines, including the 2.8L and 4.2L QSD series. Please verify your exact model and year against our compatibility table to ensure a perfect match.
Can I reuse my old turbo gasket?
No. Turbocharger gaskets are single-use, crush-style components. They are designed to deform and create a tight seal when torqued. Reusing an old gasket will almost certainly result in an exhaust leak.
What tools are required for installation?
You will typically need a socket set, wrenches, a torque wrench, a gasket scraper or plastic razor blade, and a wire brush for cleaning the flange surfaces. Penetrating oil may be helpful for loosening old, rusty bolts.
Does the gasket require any sealant?
No, this gasket is designed to be installed dry. Applying sealant can interfere with its ability to seal correctly and may even cause premature failure. Always install on clean, dry surfaces.
What is the recommended replacement interval?
There is no specific replacement interval. This gasket should be replaced whenever the turbocharger or exhaust elbow is removed for service, or if you detect any signs of a leak.
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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