Carburetor Gasket – Fits Mercury/Mariner V6 2.0L Outboards (Replaces 27-677511)
Carburetor Gasket – Fits Mercury/Mariner V6 2.0L Outboards (Replaces 27-677511) 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
Product Details
This is an aftermarket Carburetor Gasket – Fits Mercury/Mariner V6 2.0L Outboards (Replaces 27-677511), designed to provide a reliable seal between the carburetor and the intake manifold. It is compatible with a wide range of Mercury/Mariner V6 2.0L outboards, including 135-225 HP models manufactured from the late 1980s through the early 2000s.
It serves as a direct replacement for Mercury 27-677511/677511, Sierra 18-2509, GLM 516-37, and Mallory 610A, ensuring proper fit and function.
- Installation: Mounts directly between the carburetor and intake manifold to prevent air and fuel leaks.
- Material: Constructed from a durable composite/paper blend formulated for gasoline-exposed environments.
- Engine Component: This gasket is also included as a component of the Mercury Engine Gasket Set 815791A92.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 27-677511 |
| Mercury | 677511 |
| Sierra | 18-2509 |
| GLM | 516-37 |
| Mallory | 610A |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner models, compatibility is often determined by serial number range. Please verify your engine's serial number falls within the specified range.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | V-135 | 135 | 2-Stroke | 0C239553 THRU 0D081999 | 27-677511 | |
| Mercury/Mariner | V-135 | 135 | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 | |
| Mercury/Mariner | V-150 | 150 | 2-Stroke | 0C239553 THRU 0D081999 | 27-677511 | |
| Mercury/Mariner | V-150 | 150 | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 | |
| Mercury/Mariner | V-150 | 150 | 2-Stroke | 4868998 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-150 | 150 | 2-Stroke | 5600162 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-150 Magnum | 150 | 2-Stroke | 5600162 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-150 Marathon | 150 | 2-Stroke | 5600162 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-150 Work | 150 | 2-Stroke | 4868998 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-1500 | 150 | 2-Stroke | 4868998 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-1500 | 150 | 2-Stroke | 5600162 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-150-XR-2 | 150 | 2-Stroke | 4868998 THRU 0A904645 | 27-677511 | |
| Mercury/Mariner | V-175 | 175 | 2-Stroke | 0C239553 THRU 0D081999 | 27-677511 | |
| Mercury/Mariner | V-175 | 175 | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 | |
| Mercury/Mariner | V-175 | 175 | 2-Stroke | 4301235 THRU 0C100860 | 27-677511 | |
| Mercury/Mariner | V-175 | 175 | 2-Stroke | 8058870 & Up | 27-677511 | |
| Mercury/Mariner | V-200 | 200 | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 | |
| Mercury/Mariner | V-200 | 200 | 2-Stroke | 0C100861 THRU 0C291519 | 27-677511 | |
| Mercury/Mariner | V-200 | 200 | 2-Stroke | 5624878 THRU 0C100860 | 27-677511 | |
| Mercury/Mariner | V-200 (2.5L) | 200 | 2-Stroke | 0C291520 THRU 0D081999 | 27-677511 | 1991 ONLY |
| Mercury/Mariner | XR-4 | 2-Stroke | 0C239553 THRU 0D081999 | 27-677511 | ||
| Mercury/Mariner | XR-6 | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 | ||
| Mercury/Mariner | MERC/MAR 2.5L (CARB) | 2-Stroke | 0D935271 AND UP | 27-677511 | ||
| Mercury/Mariner | MERC/MAR XR2/MAGNUM | 2-Stroke | 0D935271 AND UP | 27-677511 | ||
| Mercury/Mariner | S2000 | 2-Stroke | 0D030200 & Up | 27-677511 | ||
| Mercury/Mariner | SST 120 | 120 | 2-Stroke | 0D030200 & Up | 27-677511 | |
| Mercury/Mariner | 105 JET | 105 | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 | |
| Mercury/Mariner | 140 JET | 140 | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 | |
| Mercury/Mariner | 225 (3.0L CARB) | 225 | 2-Stroke | 0D280813 THRU 0G760299 | 27-677511 | |
| Mercury/Mariner | 225 MARATHON (3.0L CARB) | 225 | 2-Stroke | 0G245605 THRU 0G760299 | 27-677511 | |
| Mercury/Mariner | 225 SEAPRO (3.0L CARB) | 225 | 2-Stroke | 0G245605 THRU 0G760299 | 27-677511 | |
| Mercury/Mariner | MAGNUM II | 2-Stroke | 0C239553 THRU 0D081999 | 27-677511 | ||
| Mercury/Mariner | MAGNUM III | 2-Stroke | 0D082000 THRU 0G303045 | 27-677511 |
Technical Specs
- Product Type
- Carburetor Mount Gasket
- Installation
- Positioned between carburetor and intake manifold
- Fuel Type
- Gasoline
- Housing Material
- Composite/Paper
- Dimensions
- 6.0" H x 7.5" W x 1.13" L
- Weight
- 0.14 kg (5 oz)
- Other Technical Attributes
- Component of Mercury Engine Gasket Set 815791A92
What’s in the Box
- 1x Gasket (Replaces 27-677511)
Installation Notes
- Disconnect the battery and shut off the fuel supply.
- Remove the airbox or flame arrestor to access the carburetor.
- Carefully disconnect all fuel lines, linkages, and hoses from the carburetor. Label them to ensure correct reassembly.
- Unbolt and remove the carburetor from the intake manifold.
- Remove the old carburetor gasket and meticulously clean both mating surfaces. Ensure they are free of old gasket material, grease, and debris.
- Position the new gasket onto the intake manifold, aligning it with the mounting holes.
- Reinstall the carburetor, tightening the mounting bolts evenly to the manufacturer's specified torque.
- Reconnect all fuel lines, linkages, and hoses.
- Reinstall the airbox.
- Turn the fuel supply back on and check for any leaks around the carburetor base before starting the engine.
Troubleshooting & FAQ
How do I know if my carburetor gasket is failing?
Common signs of a bad carburetor gasket include a rough or high idle, engine hesitation or stalling, vacuum leaks (which can be detected with a spray of starting fluid), and visible fuel stains around the carburetor base.
Does this gasket fit all Mercury V6 engines?
No. It is specifically designed for V6 2.0L models and some 2.5L/3.0L carbureted models as listed in the compatibility table. Always verify your engine's model and serial number against the provided list before ordering.
Is this gasket resistant to ethanol-blended fuels?
Yes, this gasket is made from modern materials designed to be resistant to the corrosive effects of standard ethanol-blended gasoline (E10).
Why are the mating surfaces so important during installation?
The carburetor gasket can only create a perfect seal if the intake manifold and carburetor base surfaces are perfectly clean and flat. Any residual old gasket material, grime, or warping can cause a vacuum leak, leading to poor engine performance.
Can I reuse my old gasket?
No. Carburetor gaskets are crush-style gaskets designed for one-time use. Once compressed, they will not provide a reliable seal if removed and reinstalled.
I replaced the gasket, but I still have a leak. What's next?
First, check that the carburetor bolts are torqued to the correct specification. If they are, inspect the carburetor flange and intake manifold for warping or cracks. A straight edge can be used to check for flatness.
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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