Exhaust Manifold Gasket – Fits MerCruiser, Volvo Penta, OMC 3.0L Engines (Replaces 27-815528, 3853256)
Exhaust Manifold Gasket – Fits MerCruiser, Volvo Penta, OMC 3.0L Engines (Replaces 27-815528, 3853256) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Exhaust Manifold Gasket – Fits MerCruiser, Volvo Penta, OMC 3.0L En...
Product Details
This high-quality Exhaust Manifold Gasket is designed for 3.0L 4-cylinder engines from top marine brands, including MerCruiser (1990–present), Volvo Penta (1993–2010), and OMC (1990 and up). It fits various models, including the popular MerCruiser 3.0L and 3.0LX series.
It serves as a direct replacement for OEM part numbers MerCruiser 27-815528 and Volvo Penta/OMC 3853256, and interchanges with aftermarket parts like Sierra 18-0680 and GLM 33580.
- Installs as a direct replacement with no modification required.
- Engineered for gasoline-fueled sterndrive applications.
- Produced in an ISO9002 certified facility for consistent quality.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 27-815528 |
| Volvo Penta | 3853256 / 914578 |
| OMC | 3853256 |
| Sierra | 18-0680 |
| GLM | 33580 |
| FEL-PRO | 17304 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For MerCruiser, this gasket fits MCM 3.0L and 3.0LX models with 4-stroke engines from 1990 onwards.
For Volvo Penta, compatibility covers 3.0L engines rated at 135 to 150 HP from 1993 through 2010.
For OMC, this part is for 3.0L 140 HP engines manufactured in 1990 and later.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | MCM 3.0L | 115–140 | 4-Stroke | 1998 & Newer | 27-815528 | |
| MerCruiser | MCM 3.0LX | 115–140 | 4-Stroke | 1990–1997 | 27-815528 | |
| Volvo Penta | 3.0L | 135 | 4-Stroke | 1993–2010 | 3853256 | |
| Volvo Penta | 3.0L | 150 | 4-Stroke | 1993–2009 | 3853256 | |
| OMC | 3.0L | 140 | 4-Stroke | 1990 & Up | 3853256 |
Technical Specs
- Product Type
- Exhaust Manifold Gasket
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Housing Material
- OEM specification material
- Warranty
- Limited lifetime (Sierra), 1 Year (Candy Marine)
- Other Technical Attributes
- ISO9002 certified production (JLM Marine)
What’s in the Box
- 1 x Exhaust Manifold Gasket (replaces 27-815528, 3853256)
Installation Notes
- Disconnect the battery and completely drain the engine's cooling system.
- Carefully detach and remove the exhaust manifold, then discard the old gasket.
- Thoroughly clean both the cylinder head and manifold mating surfaces. Ensure they are free of old gasket material, rust, and debris for a proper seal.
- Position the new gasket correctly onto the cylinder head studs or alignment pins. Do not use sealant unless explicitly required by the engine's service manual.
- Reinstall the exhaust manifold, then tighten the bolts in the recommended sequence to the manufacturer's specified torque.
- Refill the cooling system, reconnect the battery, start the engine, and carefully inspect for any exhaust or coolant leaks around the manifold.
Troubleshooting & FAQ
What are the signs of a failing exhaust manifold gasket?
Common symptoms include a ticking or tapping noise from the engine bay (especially when cold), visible soot or carbon tracks around the manifold, a smell of exhaust fumes in the engine compartment, and potential water leaks into the cylinders, causing performance issues.
Is this gasket compatible with both 3.0L and 3.0LX MerCruiser models?
Yes, it is designed to fit both MerCruiser MCM 3.0L (1998 & Newer) and MCM 3.0LX (1990–1997) engines as a direct replacement for OEM part 27-815528.
Should I use sealant when installing this gasket?
In most cases, this gasket is designed to be installed dry. Always refer to your engine's specific service manual for the final recommendation, as some applications may call for a light application of a specific type of sealant.
How often does this part need to be replaced?
There is no fixed replacement interval. Gaskets should be replaced whenever the exhaust manifold is removed or when signs of a leak are detected.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 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 and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is highly 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 quality control.
Payment & Security
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