Sea Water Pump Gasket – Fits MerCruiser (Replaces 27-8052151)
Sea Water Pump Gasket – Fits MerCruiser (Replaces 27-8052151) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Sea Water Pump Gasket – Fits MerCruiser (Replaces 27-8052151)
Product Details
This is a an OEM-quality replacement Sea Water Pump Gasket designed specifically for MerCruiser sea water pumps. It creates a durable, reliable seal essential for the proper function of your marine engine’s cooling system.
This part serves as a direct interchange for several part numbers, including Mercury Marine 27-8052151 and Sierra 18-0916.
- Engineered for a direct OEM replacement fit.
- Constructed to withstand harsh marine environments.
- Includes one gasket per package.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury Marine | 27-8052151 |
| Mercury Marine | 27-805215 1 |
| Mercury Marine | 27805215 |
| Mercury Marine | 2772779 |
| Mercury Marine | 2794915 |
| Sierra | 18-0916 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | OEM Part No. | Notes |
|---|---|---|
| MerCruiser | 27-8052151 | Original OEM replacement for MerCruiser sea water pumps |
Technical Specs
- Product Type
- Sea Water Pump Gasket
- Installation
- Direct OEM replacement
- Dimensions
- 6.0" H x 7.13" W x 1.13" L
- Weight
- 0.01 lb (4.5 g)
- Application
- MerCruiser Sea Water Pumps
- OEM Part Number
- 27-8052151
What’s in the Box
- 1 x Sea Water Pump Gasket (27-8052151)
Installation Notes
- Disconnect the vessel's battery before starting work.
- Drain the engine cooling system to prevent spills.
- Carefully remove the sea water pump assembly from the engine.
- Remove the old gasket and meticulously clean both mounting surfaces. Ensure they are completely free of old material, corrosion, and debris.
- Position the new gasket correctly on the clean mounting surface.
- Reinstall the sea water pump assembly, tightening all bolts to the manufacturer's specified torque in a star pattern.
- Refill the cooling system with the appropriate coolant.
- Reconnect the battery, start the engine, and inspect the pump housing for any signs of water leaks.
Troubleshooting & FAQ
How do I know if this gasket fits my specific MerCruiser engine?
The most reliable method is to match the part number from your old gasket or service manual to the numbers in our Part Number Matrix. While this part fits a wide range of MerCruiser sea water pumps, confirming the part number (e.g., 27-8052151) ensures correct fitment.
What are the signs of a failing sea water pump gasket?
Common symptoms include visible water leaks around the sea water pump housing, engine overheating at idle or low speeds, or finding that the old gasket is cracked, brittle, or deformed upon inspection.
Can I reuse my old gasket or this new one after installation?
No. Gaskets are designed for a single use and compress to create a unique seal. Always install a new gasket whenever the pump is serviced to guarantee a leak-proof connection and prevent potential engine damage.
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.
Payment & Security
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