Head Gasket – Fits Mercury/Mariner 150-220 HP 2.4L V6 Outboards (Replaces 27-41246-1)

$19.95 $31.00

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Head Gasket – Fits Mercury/Mariner 150-220 HP 2.4L V6 Outboards (Replaces 27-41246-1) is backordered and will ship as soon as it is back in stock.

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Product Details

This high-quality Head Gasket – Fits Mercury/Mariner 150-220 HP 2.4L V6 Outboards (Replaces 27-41246-1) is designed for a precise fit on Mercury and Mariner 2.4L V6 loopcharged engines manufactured between 1978 and 1998. It serves as a crucial seal between the cylinder head and the engine block, preventing combustion leaks and coolant or oil intrusion.

It provides a direct interchange for several part numbers, including Sierra 18-3862, Aqua Power G-308, and Quicksilver/Mercury 27-41246-1, 27-412461, 27-41247, 27-96543, 27-412462, and 27-41247T01.

Engineered for vertical reed-equipped 2.4L V6 engines with a 3.375" (85.73 mm) piston diameter.
Made from durable, OEM-equivalent composite materials to ensure a reliable seal and long service life.
A quantity of two gaskets is required for a complete V6 engine overhaul (one for each cylinder bank).

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Sierra	18-3862
Aqua Power	G-308
Quicksilver/Mercury	27-41246-1
Quicksilver/Mercury	27-412461
Quicksilver/Mercury	27-41247
Quicksilver/Mercury	27-96543
Quicksilver/Mercury	27-412462
Quicksilver/Mercury	27-41247T01

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This gasket is specifically designed for the following Mercury, Mariner, and Force V6 engines.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury/Mariner	V-150 (XR4 / Magnum II)	150	2-Stroke	1988–1991	27-41246-1	Serial Range: 0B242885-0C239552
Mercury/Mariner	V-175	175	2-Stroke	1984–1991	27-41246-1	Serial Range: 6618751-0C239552
Mercury/Mariner	V-200	200	2-Stroke	1982–1991	27-41246-1	Serial Range: 6073192-0C291519
Mercury/Mariner	V-200 EFI	200	2-Stroke	1989–1990	27-41246-1	Serial Range: 0C100861-0C291519
Mercury/Mariner	V-220	220	2-Stroke	1987–1988	27-41246-1	Serial Range: 0B117316 and Up

Technical Specs

Product Type: Head Gasket
Installation Location: Between cylinder head and engine block
Material: OEM-equivalent composite material
Piston Diameter Fit: 3.375" (85.73 mm)
Package Dimensions: Height: 6.0 in; Width: 17.0 in; Length: 40.0 in
Cylinder Configuration: V6
Engine Displacement: 2.4L
Compatible Fuel Systems: Carburetor or EFI models
Required Quantity Per Engine: 2 (one per bank)
Technical Notes: For vertical reed-equipped engines

What’s in the Box

1 x Head Gasket (Replaces OEM 27-41246-1)

Installation Notes

Disconnect the battery and completely drain the engine's cooling system to prevent spills and electrical hazards.
Remove the powerhead cowl and any interfering components to access the cylinder head(s).
Systematically loosen and remove the cylinder head bolts in the reverse order of the manufacturer's tightening sequence.
Carefully lift the cylinder head off the block. If it is stuck, gently tap it with a soft mallet; do not pry between the mating surfaces.
Remove the old head gasket. Thoroughly clean both the cylinder head and engine block surfaces of all old gasket material, sealant, and carbon buildup.
Position the new gasket on the engine block, ensuring it aligns correctly with dowel pins and passages. Do not use sealant unless explicitly required by your service manual.
Carefully place the cylinder head back onto the block and new gasket.
Install the head bolts finger-tight, then torque them in the correct sequence and stages according to your engine's service manual specifications. This is critical to ensure a proper seal.
Reassemble all previously removed components, reconnect the cooling system hoses, and refill with the correct coolant.
Reconnect the battery, start the engine, and check carefully for any coolant, exhaust, or compression leaks around the head.

Troubleshooting & FAQ

How many gaskets do I need for my V6 engine?

You will need two head gaskets for a complete V6 engine service—one for each cylinder bank. This package contains one gasket.

How do I know if my head gasket is failing?

Common signs of a blown head gasket include engine overheating, white smoke from the exhaust (burning coolant), milky or foamy oil, loss of compression in one or more cylinders, and mysterious coolant loss without visible external leaks.

Is this gasket compatible with both carbureted and EFI models?

Yes, this head gasket fits both carbureted and Electronic Fuel Injection (EFI) versions of the specified 2.4L V6 engines, as noted in the compatibility table.

What does "for vertical reed-equipped engines" mean?

"Vertical reeds" refers to the orientation of the reed valves in the engine's intake system. This gasket is specifically designed for 2.4L blocks that use this configuration. Please verify your engine's specifications before ordering.

Do I need to use gasket sealant or adhesive during installation?

In most cases, this type of composite gasket is designed to be installed dry. Using sealant can interfere with its ability to seal correctly. Always follow the specific instructions in your engine's official service manual.

What torque specification should I use for the head bolts?

Torque specifications and the correct tightening sequence are critical and vary by engine model. This information must be sourced from the official manufacturer's service manual for your specific engine. Improper torqueing will lead to gasket failure.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. All parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available.

Warranty & returns

This part is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.

Safety & Important Info

Verify all images and specifications against your original part before purchasing. If anything differs—even if your model appears on a compatibility list—do not purchase.
This is an aftermarket replacement part, not an OEM component. Brand names and part numbers are used for reference purposes only.
Professional installation is highly recommended for safety and to ensure optimal performance. Incorrect installation can lead to engine damage.

About Sea Sierra

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