Carburetor Gasket – Fits Mercury MerCruiser 7.4L V8 Engines (Replaces 27-41609, 27-65577)
Carburetor Gasket – Fits Mercury MerCruiser 7.4L V8 Engines (Replaces 27-41609, 27-65577) 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 high-quality Carburetor Gasket – Fits Mercury MerCruiser 7.4L V8 Engines ensures a proper seal between the carburetor and intake manifold. It is specifically designed for MerCruiser inboard and sterndrive 7.4L (454 cu. in.) V8 engines manufactured between 1995 and 1997.
This part is a direct interchange for Mercury part numbers 27-41609, 27-65577, and 41609, as well as Sierra K138-25 and Quicksilver 27-41609.
- Installs on Weber/Holley 4-barrel carburetors.
- Creates a secure seal for the fuel system.
- Designed as a flat gasket for the mounting interface between the carburetor and intake manifold.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 27-41609 |
| Mercury | 27-65577 |
| Mercury | 41609 |
| Sierra | K138-25 |
| Quicksilver | 27-41609 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury MerCruiser Models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 7.4L MIE | 454 | 4-Stroke | 1995–1997 | 27-41609 | Also listed as 27-65577, 41609 |
| MerCruiser | 7.4L BRAVO I-II | 454 | 4-Stroke | 1995–1997 | 27-41609 | Also listed as 27-65577, 41609 |
| MerCruiser | 7.4L BRAVO III | 454 | 4-Stroke | 1996–1997 | 27-41609 | Also listed as 27-65577, 41609 |
| MerCruiser | 454 MAG. BRAVO (GEN. V) | 454 | 4-Stroke | 1995–1997 | 27-41609 | Also listed as 27-65577, 41609 |
| MerCruiser | 7.4L BRAVO (GEN. V) | 454 | 4-Stroke | 1992–1996 | 27-41609 | |
| MerCruiser | 7.4L BRAVO (GEN. VI) | 454 | 4-Stroke | 1996–1997 | 27-41609 | |
| MerCruiser | 500 Bulldog | 540 | 4-Stroke | 1990–1996 | 27-41609 | |
| MerCruiser | 500 Bulldog | 540 | 4-Stroke | 1999–2001 | 27-41609 |
Technical Specs
- Product Type
- Carburetor Mounting Gasket
- Installation
- Weber/Holley 4-barrel carburetor
- Fuel Type
- Gasoline
- Connection
- Mounting interface between carburetor and intake manifold
- Housing Material
- Paper/Composite
- Dimensions
- 18.0 cm L × 18.5 cm W × 0.3 cm H
- Weight
- 50g (0.11 lb)
- Fitting Type
- Flat gasket
- Other Attributes
- Weber/Holley 4-barrel (4 corps) carburetor mounting gasket
What’s in the Box
- 1 x Gasket (Replaces 27-41609/27-65577/41609)
Installation Notes
- Disconnect the negative battery terminal for safety.
- Carefully label and disconnect all fuel lines, vacuum hoses, and throttle linkages attached to the carburetor.
- Remove the mounting nuts or bolts securing the carburetor to the intake manifold.
- Gently lift the carburetor away from the manifold. Avoid using force that could damage components.
- Remove the old carburetor gasket. Thoroughly clean both the carburetor base and the intake manifold mating surfaces of any old gasket material or sealant residue.
- Position the new gasket onto the intake manifold, ensuring all mounting holes align correctly.
- Carefully place the carburetor back onto the new gasket.
- Hand-tighten the mounting nuts/bolts, then torque them to the manufacturer's specified values in a crisscross pattern. Do not overtighten.
- Reconnect all fuel lines, linkages, and hoses.
- Reconnect the battery. Before starting the engine, prime the fuel system and check for any fuel leaks around the carburetor base.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
This gasket is designed for Mercury MerCruiser 7.4L (454 cu. in.) and 500 Bulldog V8 engines from specific model years. Please review the 'Engine & Model Compatibility' table on this page and compare the listed OEM part numbers with your existing part or service manual to ensure an exact match.
What are common signs of a failing carburetor gasket?
Symptoms of a bad gasket include vacuum leaks, which can cause a rough or high idle, stalling, and hissing sounds. You might also notice fuel leaks around the base of the carburetor or experience poor engine performance and reduced fuel efficiency.
Is sealant required for installing this gasket?
Typically, this type of paper/composite gasket is designed to be installed dry. Applying sealant can sometimes cause it to swell or slide out of place, leading to leaks. Always consult your engine’s official service manual for the recommended procedure.
How often does this gasket need to be replaced?
We recommend replacing the carburetor mounting gasket any time the carburetor is removed for cleaning, rebuilding, or other service. It should also be replaced immediately if you detect any signs of a fuel or vacuum leak.
What is the difference between an OEM and an aftermarket part?
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.
What are the shipping speeds and costs?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
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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