Inner Exhaust Gasket – Fits Yamaha & Mercury 9.9/15 HP Outboards (Replaces 682-41112-00-00, 682-41112-A1-00)

$6.49

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Product Details

This high-quality Inner Exhaust Gasket – Fits Yamaha & Mercury 9.9/15 HP Outboards (Replaces 682-41112-00-00, 682-41112-A1-00) creates a reliable, leak-free seal between exhaust components. It is designed for specific Yamaha 9.9–15 HP 2-Stroke outboards (1984–1995) and compatible Mercury 9.9–15 HP 2-Stroke models.

This part is a direct cross-reference for Yamaha part numbers 682-41112-00-00, 682-41112-A1-00, 682-41114-00-00 and Mercury equivalents 27-83951, 83951M, and 15318M.

Installs between exhaust components to prevent leaks.
Engineered for durability in marine environments.
Note: Two gaskets are required for a complete installation on one motor.

Part Number Matrix

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

Brand	Part Number	Superseded By	Notes
Yamaha	682-41112-00-00	682-41112-A1-00	Original part, now superseded.
Yamaha	682-41112-A1-00		Current replacement part.
Yamaha	682-41114-00-00		Alternative reference number.
Mercury	27-83951
Mercury	83951M
Mercury	15318M

Engine & Model Compatibility

Confirm your engine model and year in the table below.

For Yamaha models, this gasket is compatible with select 9.9 HP and 15 HP 2-stroke engines manufactured from 1984 through 1995.

For Mercury models, this part fits various 9.9 HP and 15 HP 2-stroke outboards.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Yamaha	9.9/15 HP	9.9, 15	2-Stroke	1984–1995	682-41112-00-00, 682-41112-A1-00	682-41112-00-00 superseded by 682-41112-A1-00
Yamaha	2 Cyl	9.9, 15	2-Stroke	1984–1995	682-41112-00-00, 682-41112-A1-00
Mercury	Various	9.9, 15	2-Stroke		27-83951, 83951M, 15318M

Technical Specs

Product Type: Inner Exhaust Gasket
Installation: Between exhaust components
Housing Material: Gasket material
Dimensions: 6.0" L x 7.25" W x 0.63" H
Other Technical Attributes: Two gaskets required per motor
Warranty: Varies by seller

What’s in the Box

1 x Inner Exhaust Gasket (Replaces 682-41112-A1-00) – Note: Two gaskets are needed per engine.

Installation Notes

Ensure the engine is completely cool and disconnect the battery cable for safety.
Gain access to the exhaust system components where the gasket is located.
Carefully remove the old, worn-out inner exhaust gasket.
Thoroughly clean both mating surfaces, ensuring they are free of old gasket material or carbon buildup.
Position the new gasket correctly between the components. Remember, two gaskets are required per engine.
Reassemble all parts and tighten fasteners to the manufacturer's recommended torque specifications.
Reconnect the battery, start the engine, and carefully check for any signs of an exhaust leak.

Troubleshooting & FAQ

How do I confirm this gasket is correct for my engine?

The best method is to verify your old part number against our Part Number Matrix. Additionally, please check your engine's model, horsepower, and year against the compatibility list provided. If you are unsure, do not purchase.

What are the signs of a failed exhaust gasket?

Common symptoms include a noticeably louder engine noise, an exhaust smell in or around the engine cowl, reduced engine performance, or visible black soot tracking from the gasket area.

Why are two gaskets required for the job?

The engine design calls for two separate inner exhaust gaskets to create a complete seal. Please be aware that this package contains only ONE gasket. You must purchase two units for a full replacement on a single motor.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency.

Shipping speed & cost?

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

Warranty & returns?

This part is 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 if the part is unused and in original condition. See our policy page or reach out for instructions.

Safety & Important Info

Verify images and specifications against 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

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