Carburetor Mounting Gasket – Fits Mercury/Mercruiser 35/90/115 HP Outboards (Replaces 27-481641)
Carburetor Mounting Gasket – Fits Mercury/Mercruiser 35/90/115 HP Outboards (Replaces 27-481641) 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).
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 aftermarket Carburetor Mounting Gasket ensures a proper seal between the carburetor and manifold on various Mercury Marine outboard engines. It is designed for 35 HP, 90 HP, and 115 HP (6-cylinder) models from the 1970s and later, preventing vacuum and fuel leaks for optimal engine performance.
It serves as a direct replacement for Mercury part numbers 27-481641 and 27-48164, as well as aftermarket equivalents like GLM 31500 and Sierra 18-2802.
- Installs directly between the carburetor and intake manifold.
- Engineered for use in gasoline marine environments.
- Includes one gasket for a complete replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 27-481641 |
| Mercury | 27-48164 |
| GLM | 31500 |
| Sierra | 18-2802 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is compatible with specific models from the Mercury/Mercruiser brand family.
| Brand | Model | Rated HP | Years | OEM Part No. |
|---|---|---|---|---|
| Mercury | 35 | 35 | B110789 & Up | 27-481641 |
| Mercury | 35 | 35 | 9466647 & Up | 27-481641 |
| Mercury | 90 (6 CYL.) | 90 | 6436123 & Up | 27-481641 |
| Mercury | 90 (6 CYL.) | 90 | 7208848 & Up | 27-481641 |
| Mercury | 115 (6 CYL.) | 115 | 6436123 & Up | 27-481641 |
| Mercury | 115 (6 CYL.) | 115 | 7208848 & Up | 27-481641 |
Technical Specs
- Product Type
- Carburetor Mounting Gasket
- Installation
- Direct mounting between carburetor and manifold
- Fuel Type
- Gasoline
- Housing Material
- Gasket paper/composite
- Dimensions
- Width: 6.0 in, Height: 7.5 in, Depth: 1.06 in
What’s in the Box
- 1 x Carburetor Mounting Gasket (27-481641)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery as a safety precaution.
- Turn off the fuel supply and place a rag below the carburetor to catch any spills.
- Carefully disconnect fuel lines and linkages, then unbolt and remove the carburetor.
- Remove the old gasket and meticulously clean both the carburetor and manifold surfaces of any residue.
- Position the new gasket, ensuring all mounting holes align perfectly.
- Reinstall the carburetor, tightening mounting bolts evenly and to the torque specified by the manufacturer.
- Reconnect all linkages and fuel lines, then restore the fuel supply.
- After reconnecting the battery, check for any fuel leaks before starting the engine.
Troubleshooting & FAQ
How do I confirm this gasket fits my engine?
The most reliable method is to match your engine's model and year/serial number against the compatibility table. Also, compare the shape of our product ainst your old part before ordering.
What are the signs of a bad carburetor gasket?
Common symptoms include a rough idle, engine stalling, poor acceleration, and fuel or vacuum leaks around the carburetor base. A visual inspection may reveal cracks or deterioration on the old gasket.
Can I reuse my old gasket?
No. Gaskets are designed for one-time use. They compress and deform to create a seal, and reusing an old one will likely result in leaks and poor engine performance.
Do I need to apply sealant to this gasket?
Generally, this type of gasket is designed to be installed dry. Applying sealants can sometimes interfere with its ability to seal properly. Always follow your engine service manual's recommendations.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials and manufactured in an ISO 9001 facility, with batch inspections for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 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 if unused and in original condition.
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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