Cylinder Head Gasket – Fits Yamaha F30/F40 4-Stroke Outboards (Replaces 67C-11181-01-00)

$61.88 $99.00

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Cylinder Head Gasket – Fits Yamaha F30/F40 4-Stroke Outboards (Replaces 67C-11181-01-00) is backordered and will ship as soon as it is back in stock.

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Product Details

This Cylinder Head Gasket – Fits Yamaha F30/F40 4-Stroke Outboards (Replaces 67C-11181-01-00) is a crucial component for maintaining the top end of Yamaha F30 and F40 4-stroke outboards (30–40 HP, 3-cylinder) manufactured between 2000 and 2009. It also fits specific Mercury 30–40 HP 3-cylinder EFI models.

This part is a direct replacement for Yamaha part numbers 67C-11181-01-00 and 67C-11181-00-00, and interchanges with Mercury 27-834777, 8M0118180, GLM 36370, and WSM 506-29.

Engineered specifically for 3-cylinder engine applications.
Installs on the engine's top end to seal the cylinder head to the block.
Made from a durable composite material designed for marine environments.

Part Number Matrix

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

Brand	Part Number	Superseded Part(s)
Yamaha	67C-11181-01-00	67C-11181-00-00
Mercury	27-834777 / 8M0118180
GLM	36370
WSM	506-29

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This gasket fits a range of Yamaha F30 and F40 3-cylinder, 4-stroke outboards from 2000–2009.

It is also compatible with select Mercury 30 HP and 40 HP 3-cylinder EFI 4-stroke models. Verify your Mercury part number, as specific year ranges are not available.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Yamaha	F30TRZ	30	4-Stroke	2000–2001	67C-11181-01-00
Yamaha	F40ESAY	40	4-Stroke	2000	67C-11181-01-00
Yamaha	F40MSHY	40	4-Stroke	2000	67C-11181-01-00
Yamaha	F40MLHY	40	4-Stroke	2000	67C-11181-01-00
Yamaha	F40TRLY	40	4-Stroke	2000	67C-11181-01-00
Yamaha	F40ERZ	40	4-Stroke	2001	67C-11181-01-00
Yamaha	F40MHZ	40	4-Stroke	2001	67C-11181-01-00
Yamaha	F40TRZ	40	4-Stroke	2001	67C-11181-01-00
Yamaha	F30/F40	30-40	4-Stroke	2000–2009	67C-11181-01-00

Technical Specs

Product Type: Cylinder Head Gasket
Installation: Engine Top End
Material: Composite
Dimensions: 32.0cm L x 17.0cm W x 0.5cm H
Engine Application: Fits 3-cylinder motors
OEM Reference: Yamaha 67C-11181-01-00

What’s in the Box

1 x Cylinder Head Gasket

Installation Notes

Disconnect the battery and relieve fuel system pressure.
Drain the engine coolant and oil completely.
Remove the valve cover, intake and exhaust manifolds, and any other components obstructing access to the cylinder head.
Loosen and remove the cylinder head bolts in the reverse sequence specified by the manufacturer's service manual.
Carefully lift the cylinder head off the engine block. Avoid prying, which can damage the mating surfaces.
Remove the old head gasket. Thoroughly clean both the cylinder head and engine block surfaces until they are free of all old gasket material, sealant, oil, and debris.
Place the new gasket into position on the block, ensuring its orientation is correct. Do not use sealant unless specifically required by the service manual.
Carefully lower the cylinder head back onto the block and gasket.
Install new cylinder head bolts. Tighten them in the correct sequence and to the precise torque specifications provided in your engine's service manual.
Reassemble all components (manifolds, valve cover, etc.) in the reverse order of removal.
Refill the engine with the correct type and amount of oil and coolant.
Reconnect the battery, start the engine, let it reach operating temperature, and meticulously check for any fuel, oil, or coolant leaks.

Troubleshooting & FAQ

How do I confirm this gasket fits my engine?

Please review the compatibility table, which lists specific Yamaha models, years, and horsepower ratings. The most reliable method is to cross-reference the OEM part number (e.g., Yamaha 67C-11181-01-00) with your engine's service manual or existing part.

What are common signs of a failed head gasket?

Symptoms include engine overheating, unexplained loss of power, a milky or foamy appearance in the engine oil (indicating coolant mixing with oil), and excessive white smoke from the exhaust. A compression test is a reliable method for diagnosis.

Is this gasket for 2-stroke or 4-stroke engines?

This gasket is designed exclusively for the 4-stroke Yamaha and Mercury engines listed in the compatibility chart.

Do I need to use sealant when installing this gasket?

Generally, no. Modern composite gaskets are designed to be installed dry. Applying sealant can interfere with the seal's integrity and cause premature failure. Always follow the instructions in your engine's official service manual.

Should I reuse my old cylinder head bolts?

It is strongly recommended to use new head bolts. Many are torque-to-yield (TTY) bolts that permanently stretch during installation and cannot provide the correct clamping force if reused, which could lead to gasket failure.

What is the difference between an OEM and aftermarket part?

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

What are the shipping speed and cost?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most orders, with expedited options available at checkout where applicable.

What is the warranty and return policy?

This part is covered by a 1-year warranty against manufacturing defects under normal use. If an issue arises, contact our support team with your order details. Returns are accepted within our standard window, provided the part is unused and in its original condition. Please see our policy page or reach out for instructions.

Safety & Important Info

Verify images and specifications against your original part before purchasing. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement part, not an OEM component. All mentions of brand names and part numbers are for reference purposes only.
Professional installation is highly recommended for safety and optimal performance. Incorrect installation can lead to engine damage.

About Sea Sierra

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