Gasket – Fits Mercury/Mariner Verado 135-400HP (Replaces 27-889561)
Gasket – Fits Mercury/Mariner Verado 135-400HP (Replaces 27-889561) is backordered and will ship as soon as it is back in stock.
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Gasket – Fits Mercury/Mariner Verado 135-400HP (Replaces 27-889561)
Product Details
This aftermarket Gasket – Fits Mercury/Mariner Verado 135-400HP (Replaces 27-889561) is a poppet gasket designed for the fuel system of Mercury/Mercruiser 4-Stroke Verado engines from 135HP to 400HP, manufactured from 2004–present.
It serves as a direct replacement for Mercury part number 27-889561 and Quicksilver 27-889561.
- Installation Method: Direct OEM replacement
- Application: Verado poppet gasket for gasoline fuel systems
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 27-889561 |
| Quicksilver | 27-889561 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner Verado models, verify your engine’s serial number falls within the ranges specified in the 'Notes' column to ensure precise fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | Verado (4 Cylinder) | 135 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P419487-0P464487, 0P464488-0P514868, 0P514869 & Up, 1B227000-1B381711, 1B381712-1B517158, 1B517159 & Up |
| Mercury | Verado (4 Cylinder) | 150 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P419487-0P464487, 0P464488-0P514868, 0P514869 & Up, 1B227000-1B381711, 1B381712-1B517158, 1B517159 & Up |
| Mercury | Verado (4 Cylinder) | 175 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P419487-0P464487, 0P464488-0P514868, 0P514869 & Up, 1B227000-1B381711, 1B381712-1B517158, 1B517159 & Up |
| Mercury | Verado (4 Cylinder) | 200 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P514869 & Up, 1B517159 & Up |
| Mercury | Verado (6 Cylinder) | 200 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P409357-0P464487, 0P464488-0P520552, 0P520553-2B144122, 0T980000-1B226999, 1B227000-1B381711, 1B381712-1B517433, 1B517434-2B144122, 2B144123-2B578935 |
| Mercury | Verado Pro (6 Cylinder) | 200 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 2B034840-2B144122, 2B144123-2B577715 |
| Mercury | Verado (6 Cylinder) | 225 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P409357-0P464487, 0P464488-0P520552, 0P520553-2B144122, 0T980000-1B226999, 1B227000-1B381711, 1B381712-1B517433, 1B517434-2B144122, 2B144123-2B578935 |
| Mercury | Verado (6 Cylinder) | 250 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P409357-0P464487, 0P464488-0P520552, 0P520553-2B144122, 0T980000-1B226999, 1B227000-1B381711, 1B381712-1B517433, 1B517434-2B144122, 2B144123-2B578935 |
| Mercury | Verado Pro (6 Cylinder) | 250 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 1B830170-2B144122, 2B144123-2B577715 |
| Mercury | Verado (6 Cylinder) | 275 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P409357-0P464487, 0P464488-0P520552, 0P520553-2B144122, 0T980000-1B226999, 1B227000-1B381711, 1B381712-1B517433, 1B517434-2B144122, 2B144123-2B578935 |
| Mercury | Verado (6 Cylinder) | 300 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 0P520553-2B144122, 1B517434-2B144122, 2B144123-2B578935 |
| Mercury | Verado Pro (6 Cylinder) | 300 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 1B830170-2B144122, 2B144123-2B577715 |
| Mercury | Verado (6 Cylinder) | 350 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 1B716557-2B143542, 2B141617-3B342962 |
| Mercury | Verado Pro (6 Cylinder) | 350 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 2B141124-3B342962 |
| Mercury | Verado (6 Cylinder) | 400 | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 2B141124-3B342962, 2B618256-3B342962 |
| Mercury | Racing (6 Cylinder) | 400R | 4-Stroke | 2004–Present | 27-889561 | Serial ranges: 2B141124-3B342962 |
Technical Specs
- Product Type
- Gasket
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline
- Dimensions
- Approximately 10.0" × 10.0" × 0.1" (254mm × 254mm × 2.5mm)
- Weight
- 0.014 kg (0.03 lbs)
- Other Technical Attributes
- Verado poppet gasket for fuel system
What’s in the Box
- 1 x Gasket (Replaces 27-889561)
Installation Notes
- Ensure the engine is off and cool. Disconnect the battery and relieve fuel system pressure according to your engine's service manual.
- Locate the poppet valve and its gasket within the Verado fuel system assembly.
- Carefully remove the mounting hardware to access the old gasket. Discard the used gasket.
- Thoroughly clean both mating surfaces, removing any old gasket material or debris. Ensure the surfaces are completely dry.
- Place the new gasket into position, making sure it aligns perfectly with the component and mounting holes.
- Re-install the cover and fasteners, tightening them in a crisscross pattern to the manufacturer-specified torque to ensure an even seal.
- Reconnect the battery, prime the fuel system as needed, and carefully check for any leaks before starting the engine.
Troubleshooting & FAQ
How can I confirm this gasket fits my specific Verado model?
This gasket fits a broad range of Mercury/Mariner Verado engines from 135HP to 400HP (2004–present). The most reliable method to confirm fitment is to check your engine's serial number against the ranges listed in the Engine & Model Compatibility table. If your serial number falls within a listed range, this part will fit.
What are the common signs of a failing poppet gasket?
A failed poppet gasket can cause symptoms such as a rough idle, poor engine performance, stalling, or visible fuel leaks around the gasket area. If you notice a strong smell of gasoline near the engine, inspect the gasket and surrounding components immediately.
Is there a recommended replacement interval for this gasket?
Gaskets do not have a fixed replacement schedule. They should be replaced whenever the component they seal is serviced, or if any signs of leaking, cracking, or deterioration are visible.
Can I reuse my old gasket if it looks undamaged?
No. Gaskets are designed for one-time use. They compress to form a unique seal. Once removed, they lose their ability to create a reliable, leak-proof seal and must always be replaced with a new one to prevent fuel or pressure leaks.
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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