Powerhead Gasket – Fits Mercury/Mercruiser 50/60 HP 3-Cylinder (Replaces 27-884511)
Powerhead Gasket – Fits Mercury/Mercruiser 50/60 HP 3-Cylinder (Replaces 27-884511) 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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Powerhead Gasket – Fits Mercury/Mercruiser 50/60 HP 3-Cylinder (Rep...
Product Details
This Powerhead Gasket creates a secure seal between the powerhead and the exhaust plate on specific Mercury Marine 50/60 HP 3-cylinder engines. It is engineered to prevent exhaust and water leaks, ensuring optimal engine compression and performance.
It serves as a direct replacement for Mercury OEM part numbers 27-884511, 27-76589, 27-78623, and 27-88451.
- Engineered for direct placement between the powerhead and exhaust plate.
- Designed for use in gasoline marine engines.
- Includes one gasket for a complete replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury | 27-884511 | Current Part Number |
| Mercury | 27-76589 | Superseded by 27-884511 |
| Mercury | 27-78623 | Superseded by 27-884511 |
| Mercury | 27-88451 | Superseded by 27-884511 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for specific 3-cylinder 50 and 60 HP Mercury engines.
| Brand | Model | Rated HP | OEM Part No. | Notes |
|---|---|---|---|---|
| Mercury | 50/60 HP | 50-60 | 27-884511 | Fits 3-cylinder configurations |
Technical Specs
- Product Type
- Powerhead Gasket
- Installation
- Direct placement between powerhead and exhaust plate
- Fuel Type
- Gasoline
- Dimensions
- Length: 1.13 in, Width: 10.0 in, Height: 13.0 in
- Weight
- 0.05 lb (0.023 kg)
What’s in the Box
- 1 x Gasket, Powerhead (27-884511)
Installation Notes
- Ensure the engine is off, cool, and disconnected from the power source.
- Remove components blocking access to the powerhead and exhaust plate.
- Carefully detach the powerhead from the exhaust plate assembly.
- Remove the old gasket and meticulously clean both mating surfaces, removing all residue and debris.
- Position the new gasket, aligning it carefully with the bolt holes. Do not use sealant unless specified by your service manual.
- Reinstall the powerhead, tightening bolts in the sequence and to the torque values specified by the manufacturer.
- Reassemble all other components, check fluid levels, and inspect for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket is designed for Mercury/Mercruiser 50/60 HP 3-cylinder engines. Always verify your OEM part number against our Part Number Matrix (27-884511) and check the Compatible Models table to ensure a perfect match.
What are the signs of a failed powerhead gasket?
Common signs include engine overheating, a noticeable loss of power or compression, water found in the cylinders, or visible water/exhaust leaks from the seal between the powerhead and exhaust plate.
Do I need sealant with this gasket?
This gasket is typically designed for a dry-fit installation. However, we always recommend consulting your engine’s official service manual for specific guidance on using sealants for your model.
When should the powerhead gasket be replaced?
You should replace the powerhead gasket whenever the powerhead is removed for service, if you observe any signs of a leak, or as part of a scheduled major engine overhaul.
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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