Carburetor to Intake Manifold Gasket – Fits Mercury MerCruiser V6/V8 Engines (Replaces 27-524572)
Carburetor to Intake Manifold Gasket – Fits Mercury MerCruiser V6/V8 Engines (Replaces 27-524572) 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 Carburetor to Intake Manifold Gasket creates a crucial seal between the carburetor and intake manifold on specific Mercury MerCruiser engines. It is designed for V6 262 CID (4.3L) and V8 305/350/454/502 CID (5.0L/5.7L/7.4L/8.2L) models manufactured between 1986 and 1998.
It serves as a direct replacement for Mercury part numbers 27-524572, 524571, and 52457, and interchanges with Sierra 18-2848, GLM 30380, Red Rhino MR-F12, and EMP 27-00359.
- Installs between the carburetor and intake manifold.
- Designed for Rochester and Weber 4-barrel carburetors.
- Made from durable paper/composite material to ensure a reliable seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury | 27-524572 | Supersedes 27-524571 and 27-52457 |
| Sierra | 18-2848 | Aftermarket Replacement |
| GLM | 30380 | Aftermarket Replacement |
| Red Rhino | MR-F12 | Aftermarket Replacement |
| EMP | 27-00359 | Aftermarket Replacement |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury MerCruiser Engines: This part fits a wide range of sterndrive and inboard models. Please verify your engine's serial number falls within the specified range for a guaranteed match.
| Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| 175 (2 BBL.) GM 262 V-6 | 175 | 4-Stroke | 1987 | 27-524572 | Serial: 0B527955-0B773242 |
| 205 (4 BBL.) GM 262 V-6 | 205 | 4-Stroke | 1987 | 27-524572 | Serial: 0B527955-0B775129 |
| 4.3L (2 BBL.) GM 262 V-6 | 190 | 4-Stroke | 1988–1992 | 27-524572 | Serial: 0B773243-0D714106 |
| 4.3L (GEN+) (2 BBL.) GM 262 V-6 | 190 | 4-Stroke | 1998 | 27-524572 | Serial: 0L010044-0M614999 |
| 4.3L (GEN+) (4BBL) Reman | 220 | 4-Stroke | 1998+ | 27-524572 | Serial: 1G400000 & Up |
| 4.3L (GEN II) (2 BBL.) GM 262 V-6 | 190 | 4-Stroke | 1992–1996 | 27-524572 | Serial: 0D714107-0F802999 |
| 4.3LX (4 BBL.) GM 262 V-6 | 220 | 4-Stroke | 1988–1992 | 27-524572 | Serial: 0B775130-0D714369 |
| 4.3LX (GEN+) (2 BBL.) GM 262 V-6 | 190 | 4-Stroke | 1996–1997 | 27-524572 | Serial: 0F803000-0K999999 |
| 4.3LX (GEN II) (4 BBL.) GM 262 V-6 | 220 | 4-Stroke | 1992–1996 | 27-524572 | Serial: 0D714370-0F802999 |
| 4.3LH/LXH (GEN+) (4 BBL.) GM 262 V-6 | 220 | 4-Stroke | 1996–1998 | 27-524572 | Serial: 0F803114-0M614999 |
| 200/230/260 (2/4 BBL.) GM 305 V-8 | 200-260 | 4-Stroke | 1987 | 27-524572 | Serial: 0B525982-0B774444 |
| 5.0L (2 BBL.) GM 305 V-8 | 220 | 4-Stroke | 1988–1995 | 27-524572 | Serial: 0B774445-0F600999 |
| 5.0L MIE (4 BBL.) GM 305 V-8 | 220 | 4-Stroke | 1987–1995 | 27-524572 | Serial: 0B522506-0B788151 |
| 5.0LX (4 BBL.) GM 305 V-8 | 220 | 4-Stroke | 1988–1995 | 27-524572 | Serial: 0B773740-0F600999 |
| 260 MIE/350 MAG. ALPHA GM 350 V-8 | 260-300 | 4-Stroke | 1987–1995 | 27-524572 | Serial: 0B522506-0F600999 |
| 5.7L/5.7LX (2/4 BBL.) GM 350 V-8 | 250-280 | 4-Stroke | 1988–1997 | 27-524572 | Serial: 0B525982-0K999999 |
| 5.7L MIE GM 350 V-8 | 250 | 4-Stroke | 1988–1997 | 27-524572 | Serial: 0B788197-0K999999 |
| 5.7L/LX EFI (TBI) GM 350 V-8 | 250-280 | 4-Stroke | 1995–1997 | 27-524572 | For TBI models |
| 350 MAG (SKI) GM 350 V-8 | 300 | 4-Stroke | 1991–1997 | 27-524572 | Serial: 0D505450-0K999999 |
| 350 MAG. EFI SKI (TBI) GM 350 V-8 | 300 | 4-Stroke | 1994–1996 | 27-524572 | Serial: 0F215561-0F820706 |
| 5.7L COMPETITION SKI GM 350 V-8 | 330 | 4-Stroke | 1987–1995 | 27-524572 | Serial: 0B514627-0F775199 |
| 454 MAG. ALPHA GM 454 V-8 | 330 | 4-Stroke | 1986–1988 | 27-524572 | Serial: 0A631894-0B785148 |
| 454 MAG. BRAVO GM 454 V-8 | 330 | 4-Stroke | 1988–1994 | 27-524572 | Serial: 0B721206-0F304999 |
| 7.4L BRAVO GM 454 V-8 | 330 | 4-Stroke | 1988–1996 | 27-524572 | Serial: 0B771113-0F800699 |
| 7.4L MIE W/HURTH GM 454 V-8 | 330 | 4-Stroke | 1989–1992 | 27-524572 | Serial: 0C391564-0D715493 |
| 7.4L MIE (LH) GEN. V/VI GM 454 V-8 | 330 | 4-Stroke | 1992–1997 | 27-524572 | Serial: 0D715494-0K999999 |
| 502 MAG. BRAVO GM 502 V-8 | 415 | 4-Stroke | 1990–1993 | 27-524572 | Serial: 0C878221-0F114528 |
| 8.2L MIE W/HURTH GM 502 V-8 | 415 | 4-Stroke | 1990–1992 | 27-524572 | Serial: 0C878221-0D857199 |
Technical Specs
- Product Type
- Carburetor to Intake Manifold Gasket
- Installation Location
- Between carburetor and intake manifold
- Fuel Type
- Gasoline
- Material
- Paper/Composite
- Design Compatibility
- Designed for use with Rochester and Weber 4-barrel carburetors
- Product Dimensions
- 6.0" H x 9.31" W x 1.13" L
What’s in the Box
- 1 x Carburetor to Intake Manifold Gasket (27-524572)
Installation Notes
- Disconnect the negative battery terminal and relieve any pressure from the fuel system.
- Remove the flame arrestor and air cleaner assembly from the top of the carburetor.
- Carefully disconnect all fuel lines, vacuum hoses, throttle linkages, and electrical connectors from the carburetor.
- Remove the carburetor mounting bolts or nuts and lift the carburetor straight up and off the intake manifold.
- Remove the old gasket. Thoroughly clean both the carburetor base and the intake manifold mating surfaces of any old gasket material or debris.
- Place the new gasket onto the intake manifold, ensuring all bolt holes and bores align correctly.
- Carefully lower the carburetor back onto the new gasket.
- Tighten the mounting bolts in a crisscross pattern to the manufacturer's recommended torque specification to ensure an even seal.
- Reconnect all fuel lines, linkages, hoses, and electrical connectors.
- Reinstall the flame arrestor assembly, reconnect the battery, and carefully check for any fuel leaks before starting the engine.
Troubleshooting & FAQ
How do I know if I need to replace my carburetor gasket?
Common signs of a faulty gasket include a rough or unstable idle, engine stalling, a distinct hissing sound indicating a vacuum leak near the carburetor base, and reduced fuel efficiency.
Will this fit my engine if it's not on the compatibility list?
We can only guarantee fitment for the specific models, years, and serial number ranges provided in the compatibility table. Using this part on an unlisted model is not recommended and may result in improper sealing.
What is the difference between this gasket and the OEM part?
This aftermarket gasket is manufactured to meet or exceed original equipment (OEM) specifications for fit, form, and function. It is made from comparable high-quality materials to provide a reliable seal at a more accessible price point.
How often should this gasket be replaced?
This gasket should be replaced any time the carburetor is removed from the intake manifold. Gaskets are designed for single use and compress to create a seal; reusing an old one significantly increases the risk of leaks.
Can I use sealant with this gasket?
Generally, it's best to install this type of gasket dry, as it is designed to seal on its own. Applying sealant can sometimes cause the gasket to slide out of place during installation or interfere with proper sealing. Always follow the engine manufacturer's service manual recommendations.
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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