Exhaust Outer Cover Gasket – Fits Yamaha 30-40hp Outboard Motors (Replaces 67C-41114-00-00)

$7.99 $12.00

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Exhaust Outer Cover Gasket – Fits Yamaha 30-40hp Outboard Motors (Replaces 67C-41114-00-00) is backordered and will ship as soon as it is back in stock.

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Product Details

This Exhaust Outer Cover Gasket is engineered to fit Yamaha 3-cylinder, 4-stroke 30hp (2001–2006) and 40hp (2000–2008) outboard motors. It provides a reliable seal for the exhaust system, preventing leaks and ensuring proper engine performance.

It serves as a direct interchange for Yamaha part numbers 67C-41114-00-00 and 67C-41114-10-00, and aftermarket equivalents like Sierra 18-2716 and 99089.

Installs as a direct OEM-equivalent replacement.
Designed for use in marine gasoline engine environments.
Ensures a secure, leak-free seal for the exhaust outer cover.

Part Number Matrix

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

Brand	Part Number	Superseded By	Notes
Yamaha	67C-41114-00-00	67C-41114-10-00	Original OEM part number.
Yamaha	67C-41114-10-00		Current OEM part number.
Sierra	18-2716		Aftermarket cross-reference.
Sierra	99089		Aftermarket cross-reference.

Engine & Model Compatibility

Confirm your engine model and year in the table below.

For Yamaha owners, this part is specific to the F30A and F40A four-stroke models within the listed year ranges.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Yamaha	F30A	30	4-Stroke	2001–2006	67C-41114-00-00, 67C-41114-10-00	Original part superseded by 67C-41114-10-00.
Yamaha	F40A	40	4-Stroke	2000–2008	67C-41114-00-00, 67C-41114-10-00	Original part superseded by 67C-41114-10-00.

Technical Specs

Product Type: Exhaust Outer Cover Gasket
Installation: Direct OEM replacement
Fuel Type: Gasoline
Dimensions: 8.0" x 12.0" x 0.25"

What’s in the Box

1 x Exhaust Outer Cover Gasket

Installation Notes

Ensure the engine is off, cool to the touch, and the battery is disconnected for safety.
Remove the engine cowling to access the exhaust components.
Carefully unbolt and remove the exhaust outer cover. Note the position of any brackets or hardware.
Remove the old gasket. Thoroughly clean the mating surfaces on both the engine block and the cover, ensuring they are free of old gasket material, carbon, and corrosion.
Position the new gasket correctly onto the engine block.
Re-install the exhaust outer cover and tighten the bolts in a crisscross pattern to the manufacturer's specified torque to ensure an even seal.
Reconnect the battery, start the engine, and check for any exhaust leaks around the cover.

Troubleshooting & FAQ

Which Yamaha engines does this gasket fit?

This gasket is specifically designed for Yamaha 30hp F30A (2001–2006) and 40hp F40A (2000–2008) 4-stroke outboard models. Always verify your model and year using the compatibility table before ordering.

How do I know if my exhaust cover gasket needs replacing?

Common signs of a failed gasket include a noticeable exhaust leak (hissing or popping sounds) near the engine block, visible soot or black streaks around the cover seam, and a rough or unstable idle due to improper exhaust back-pressure.

Is this gasket different from the OEM version?

Our gaskets are manufactured to meet or exceed OEM specifications using high-quality, durable materials suitable for marine environments. While compositions may vary slightly, performance and longevity are comparable to the original part.

When should this gasket be replaced?

It is best practice to replace the exhaust outer cover gasket any time the cover is removed for service or inspection. There is no fixed service interval, but it should be inspected for signs of degradation or leaks during routine engine maintenance.

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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