Intake Manifold Gasket Set – Fits Mercury/Mercruiser 4.3L & 262 MAG (Replaces 27-824326002)
Intake Manifold Gasket Set – Fits Mercury/Mercruiser 4.3L & 262 MAG (Replaces 27-824326002) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Intake Manifold Gasket Set – Fits Mercury/Mercruiser 4.3L & 262...
Product Details
This high-quality Intake Manifold Gasket Set is designed for a precise fit on Mercury/Mercruiser 4.3L, 4.3LX, 4.3LH, 4.3LXH Gen+, and 262 MAG marine engines from 1996 and newer. It creates a reliable seal for the engine's intake system, preventing vacuum and coolant leaks to maintain optimal performance.
This set serves as a direct interchange for Mercury/Mercruiser OEM part 27-824326002 and aftermarket cross-references including Sierra 18-0487 and Mallory Marine 9-61214.
- Installation: Mounts to the engine intake manifold and cylinder heads.
- Application: Specifically for marine engine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury/Mercruiser | 27-824326002 | Original Equipment Manufacturer (OEM) |
| Mercury/Mercruiser | 824326002 | Original Equipment Manufacturer (OEM) |
| Sierra | 18-0487 | Aftermarket |
| Mallory Marine | 9-61214 | Aftermarket |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercruiser models, compatibility is often defined by serial number. Please verify your engine's serial number falls within the specified range to ensure correct fitment.
| Brand | Model | Stroke | Years | OEM Part No. |
|---|---|---|---|---|
| Mercruiser | 4.3L (GEN +) (4BBL) Reman | 4-Stroke | 1G400000 & Up | 27-824326002 |
| Mercruiser | 4.3L CARB ALPHA/BRAVO | 4-Stroke | 0W650000–1A063239 | 27-824326002 |
| Mercruiser | 4.3L CARB ALPHA/BRAVO | 4-Stroke | 1A063240 & Up | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 0M615000–0W309999 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 0W310000–0W649999 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 0W650000–0W658582 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 0W658583 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 0W658584–1A030367 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 1A030368–1A030369 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 1A030370–1A063239 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 1A063240 & Up | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO | 4-Stroke | 0M300000–0M614999 | 27-824326002 |
| Mercruiser | 4.3L MPI ALPHA/BRAVO EC | 4-Stroke | 1A637496 & Up | 27-824326002 |
| Mercruiser | 262 MAG | 4-Stroke | 1996 & newer | 27-824326002 |
Technical Specs
- Product Type
- Intake Manifold Gasket Set
- Installation
- Engine Intake System
- Application
- Marine Engine
- Dimensions
- 40.0 × 9.0 × 3.0 in
- Weight
- 0.2 kg (0.44 lb)
- OEM Number
- 27-824326002
- GTIN/UPC
- 745061708679
- Warranty
- Manufacturer warranty through Mercury Marine
- Manufacturer
- Mercury Marine/Quicksilver
What’s in the Box
- 1 x Intake Gasket Set (27-824326002)
Installation Notes
- Disconnect the battery and completely drain the engine coolant.
- Remove components obstructing the intake manifold, like the air filter, throttle body, and fuel lines. Ensure fuel pressure is safely relieved before disconnecting lines.
- Carefully label and disconnect all electrical connectors and vacuum hoses connected to the manifold.
- Unbolt the intake manifold following the manufacturer's recommended sequence (typically from the center outwards).
- Thoroughly clean the gasket mating surfaces on both the cylinder heads and the intake manifold. Ensure they are free of old gasket material, oil, and debris.
- Place the new gaskets onto the cylinder heads, confirming proper alignment with the ports and bolt holes.
- Carefully reinstall the intake manifold, making sure it is seated correctly on the new gaskets.
- Tighten the manifold bolts in the correct sequence and to the torque specifications recommended by the engine manufacturer.
- Reattach all previously removed components, hoses, and electrical connectors.
- Refill the cooling system, reconnect the battery, and start the engine to check for any coolant, fuel, or vacuum leaks.
Troubleshooting & FAQ
How do I know if my intake manifold gasket is failing?
Common signs of a bad intake manifold gasket include engine overheating, coolant leaks (often visible as puddles under the vehicle or white residue around the manifold), a rough idle, poor engine performance, or milky/contaminated engine oil.
Will this gasket fit a 4.3L engine not listed by serial number?
This gasket is designed for the specific models and serial number ranges listed. If your engine's model or serial number is not in the compatibility table, we cannot guarantee fitment. Please verify your details before ordering.
Do I need to use sealant with these gaskets?
Generally, modern gaskets like these are designed to be installed dry. However, always refer to your engine's service manual. Some applications may require a small amount of RTV sealant at the corners or where the manifold meets the block end seals.
What is the recommended replacement interval?
There is no fixed replacement interval for intake manifold gaskets; they are typically replaced only when they fail. Replace yours as soon as you notice any signs of leakage or performance issues to prevent further engine damage.
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.
Payment & Security
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