Gasket – Fits Mercury-Mercruiser 50-60 HP (Replaces Mercury Marine 27-695242)

$8.50 $13.00

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Gasket – Fits Mercury-Mercruiser 50-60 HP (Replaces Mercury Marine 27-695242) is backordered and will ship as soon as it is back in stock.

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Delivery and Shipping

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Product Details

This replacement plate to exhaust manifold cover Gasket – Fits Mercury-Mercruiser 50-60 HP (Replaces Mercury Marine 27-695242) is engineered for Mercury Marine 50-60 HP 3-cylinder outboards across various years, ensuring a precise and durable seal.

This component provides a direct interchange for several part numbers, including Sierra Marine 18-0918, Mallory 9-60053, GLM 30760, and Mercury 27-69524, 27-695241, 27-695251, 27-64857, and 27-69525.

Installation: Gasket, Plate to Exhaust Manifold Cover
Quality: Meets or exceeds OEM specifications for reliable performance.

Part Number Matrix

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

Brand	Part Number
Mercury	27-695242
Mercury	27-69524
Mercury	27-695241
Mercury	27-695251
Mercury	27-64857
Mercury	27-69525
Sierra Marine	18-0918
Mallory	9-60053
GLM	30760

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Mercury models, compatibility is often defined by serial number ranges in addition to model years. Please verify your engine's serial number falls within the specified ranges.

Brand	Model	Rated HP	Years	OEM Part No.	Notes
Mercury	50 (3 CYL.)	50	0A721308 & Up	27-695242
Mercury	50 (3 CYL.)	50	0B122930 THRU 0D000749	27-695242
Mercury	50 (3 CYL.)	50	9469200 THRU 9683054	27-695242
Mercury	60 (3 CYL.)	60	0A721308 & Up	27-695242
Mercury	60 (3 CYL.)	60	0B122930 THRU 0D000749	27-695242
Mercury	60 (3 CYL.)	60	9469200 THRU 9683054	27-695242
Mercury / Mariner	50	50	1987–1990	27-695242	Replaces 27-695242
Mercury / Mariner	60	60	1987–1990	27-695242	Replaces 27-695242
Mercury	Exhaust / Cooling Systems and Extension Kits		1994 & Up	27-695242

Technical Specs

Product Type: Gasket
Installation: Gasket, Plate to Exhaust Manifold Cover
Dimensions: Length: 0.13 in; Width: 7.13 in; Height: 14.0 in
Weight: 0.06 kg (0.13 lb)
Other Technical Attributes: Genuine OEM replacement part

What’s in the Box

1 x GASKET (27-695242)

Installation Notes

Ensure the engine is off and fully cooled. Disconnect the boat's battery for safety.
Locate the exhaust manifold cover on your engine. You may need to remove other components to gain access.
Carefully loosen and remove the bolts securing the cover plate. Keep track of all hardware.
Gently pry off the cover plate and the old gasket. Avoid gouging the metal surfaces.
Thoroughly clean both the cover plate and engine block mating surfaces. All old gasket material and carbon buildup must be removed for a proper seal.
Position the new gasket onto the engine block, aligning it with the bolt holes.
Re-install the cover plate and tighten the bolts in a crisscross pattern to the manufacturer-specified torque to ensure even pressure.
Re-install any components that were removed and reconnect the battery.
Start the engine and carefully check for any signs of exhaust leaks around the newly installed gasket.

Troubleshooting & FAQ

How do I confirm this gasket fits my specific engine model?

The most reliable method is to cross-reference the OEM part number (27-695242) with your engine's service manual or existing part. You can also use our Engine & Model Compatibility table to check against your model, year, and serial number range.

What are the signs of a failing exhaust manifold gasket?

Common symptoms include a noticeable ticking or puffing sound from the engine, reduced engine performance, increased fuel consumption, or visible black soot marks around the manifold-to-plate connection.

Do I need to apply a sealant when installing this gasket?

This gasket is typically installed dry. Unless your engine's official service manual specifically instructs you to use a sealant for this application, it is not recommended, as it can sometimes prevent a proper seal.

Can I reuse my old bolts?

While possible, it is best practice to use new bolts, especially if the old ones show any signs of corrosion, stretching, or thread damage. A secure and properly torqued fit is critical for a lasting seal.

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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