Gasket Set – Fits Mercury Verado 6-Cylinder Outboards (Replaces 27-880552A07)
Gasket Set – Fits Mercury Verado 6-Cylinder Outboards (Replaces 27-880552A07) 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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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
Product Details
This complete Gasket Set – Fits Mercury Verado 6-Cylinder Outboards (Replaces 27-880552A07) is designed for 200–400 HP 4-Stroke Verado 6-cylinder engines from 2004 to the present. It provides all necessary seals for a full powerhead rebuild, ensuring a reliable, leak-free fit.
This kit serves as a direct replacement for Mercury part numbers 27-880552A07, 27-880552A06, 880552A07, 880552A06, and 880552A05.
- Engineered for an OEM factory-equivalent fit and function.
- Designed for use with standard gasoline fuel systems.
- Includes a complete set of powerhead gaskets for a comprehensive overhaul.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury | 880552A05 | 880552A06 |
| Mercury | 880552A06 | 880552A07 |
| Mercury | 27-880552A06 | 27-880552A07 |
| Mercury | 27-880552A07 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury engines, verify your model and serial number range to ensure proper fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercury | 200 PRO VERADO (6 CYL.) | 200 | 4-Stroke | 2B034840–2B144122 | 880552A07 |
| Mercury | 200 PRO VERADO (6 CYL.) | 200 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 200 VERADO (6 CYL.) | 200 | 4-Stroke | 0P520553–2B144122 | 880552A07 |
| Mercury | 200 VERADO (6 CYL.) | 200 | 4-Stroke | 1B517434–2B144122 | 880552A07 |
| Mercury | 200 VERADO (6 CYL.) | 200 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 225 VERADO (6 CYL.) | 225 | 4-Stroke | 0P520553–2B144122 | 880552A07 |
| Mercury | 225 VERADO (6 CYL.) | 225 | 4-Stroke | 1B517434–2B144122 | 880552A07 |
| Mercury | 225 VERADO (6 CYL.) | 225 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 250 PRO VERADO (6 CYL.) | 250 | 4-Stroke | 1B830170–2B144122 | 880552A07 |
| Mercury | 250 PRO VERADO (6 CYL.) | 250 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 250 VERADO (6 CYL.) | 250 | 4-Stroke | 0P520553–2B144122 | 880552A07 |
| Mercury | 250 VERADO (6 CYL.) | 250 | 4-Stroke | 1B517434–2B144122 | 880552A07 |
| Mercury | 250 VERADO (6 CYL.) | 250 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 275 VERADO (6 CYL.) | 275 | 4-Stroke | 0P520553–2B144122 | 880552A07 |
| Mercury | 275 VERADO (6 CYL.) | 275 | 4-Stroke | 1B517434–2B144122 | 880552A07 |
| Mercury | 275 VERADO (6 CYL.) | 275 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 300 PRO VERADO (6 CYL.) | 300 | 4-Stroke | 1B830170–2B144122 | 880552A07 |
| Mercury | 300 PRO VERADO (6 CYL.) | 300 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 300 VERADO (6 CYL.) | 300 | 4-Stroke | 0P520553–2B144122 | 880552A07 |
| Mercury | 300 VERADO (6 CYL.) | 300 | 4-Stroke | 1B517434–2B144122 | 880552A07 |
| Mercury | 300 VERADO (6 CYL.) | 300 | 4-Stroke | 2B144123 & Up | 880552A07 |
| Mercury | 350 PRO VERADO (6 CYL.) | 350 | 4-Stroke | 2B141124 & Up | 880552A07 |
| Mercury | 350 VERADO (6 CYL.) | 350 | 4-Stroke | 2B141617 & Up | 880552A07 |
| Mercury | 400 VERADO (6 CYL.) | 400 | 4-Stroke | 2B141124 & Up | 880552A07 |
Technical Specs
- Product Type
- Powerhead Gasket Set
- Installation
- OEM Factory Fit
- Fuel Type
- Gasoline
- Housing Material
- Various (Composite, Metal, Rubber)
- Dimensions
- 68.5 × 38.0 × 3.0 inches (1740 × 965 × 76 mm)
- Weight
- 1.63 lbs (0.74 kg)
What’s in the Box
- Complete Powerhead Gasket Set (27-880552A07)
Installation Notes
- Disconnect the battery and relieve fuel system pressure before beginning work.
- Drain the engine block of all coolant and oil.
- Systematically disassemble the engine components required to access the powerhead, keeping all hardware organized.
- Carefully remove the powerhead and place it on a clean, stable workbench.
- Remove all old gasket material from mating surfaces. Use a plastic scraper and appropriate solvent to avoid gouging the aluminum surfaces.
- Ensure all surfaces are perfectly clean, dry, and free of oil or debris before placing the new gaskets.
- Install the new gaskets, ensuring correct orientation. Do not use sealant unless specified by the engine's service manual for specific locations.
- Reassemble the powerhead and torque all bolts to the manufacturer's specified values and sequence.
- Reconnect all hoses, cables, and components, then refill with fresh oil and coolant.
- After reassembly, check for leaks before starting the engine. Run the engine at idle and re-check for any fuel, oil, or coolant leaks.
Troubleshooting & FAQ
How do I know if this gasket set fits my Mercury Verado engine?
This set is specifically for 6-cylinder Verado models from 200–400 HP (2004–present). The most reliable way to confirm fitment is to check your engine's model and serial number against the compatibility table on this page. If your engine is listed, the kit will fit.
What are the common signs of a failed powerhead gasket?
Symptoms of a bad powerhead gasket include engine overheating, loss of compression in one or more cylinders, water in the engine oil (milky appearance), or white, sweet-smelling exhaust smoke. These indicate a breach between the cooling passages and combustion chambers or crankcase.
Is this a complete kit for a powerhead rebuild?
Yes, this is a complete powerhead gasket set. It contains all the necessary gaskets and seals required to remove and reinstall the powerhead assembly on a Mercury Verado 6-cylinder outboard.
What is the recommended replacement interval for these gaskets?
Powerhead gaskets do not have a fixed replacement interval. They are typically replaced only when the powerhead is serviced for other reasons or if a gasket failure occurs.
Are any special tools required for installation?
Installation requires standard mechanic's tools, a torque wrench, and potentially an engine hoist to lift the powerhead. It is critical to follow the torque sequences and specifications listed in your engine's official service manual.
Should I use sealant with these gaskets?
Most gaskets in this kit are designed to be installed dry. Applying sealant where it's not required can cause improper sealing or block critical oil and coolant passages. Always follow the specific instructions in the Mercury service manual for your engine model.
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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