Exhaust Cover Gasket – Fits Yamaha 25-50HP (Replaces 6H4-41114-A0-00)
Exhaust Cover Gasket – Fits Yamaha 25-50HP (Replaces 6H4-41114-A0-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Exhaust Cover Gasket – Fits Yamaha 25-50HP (Replaces 6H4-41114-A0-00)
Product Details
This is a replacement Exhaust Cover Gasket for a range of Yamaha 25-50HP 2-stroke outboard engines manufactured between 1984 and 1994. It is designed to fit multiple models, including the 40N, 40H, 40E, 50ETN, and 50D series, ensuring a precise seal for the exhaust system.
This part directly replaces Yamaha OEM part numbers 6H4-41114-00-00 and 6H4-41114-A0-00.
- Installs as a direct replacement without modification.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Yamaha | 6H4-41114-00-00 | 6H4-41114-A0-00 |
| Yamaha | 6H4-41114-A0-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, please verify your engine's model code (e.g., 6H4, 6H5) and year to ensure correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 25Q (61C) | 25 | 2-Stroke | 1990 | 6H4-41114-A0-00 | |
| Yamaha | 25QEO (61C) | 25 | 2-Stroke | 1991 | 6H4-41114-A0-00 | |
| Yamaha | 40N (6H4) | 40 | 2-Stroke | 1984 | 6H4-41114-A0-00 | |
| Yamaha | 40H (6H4) | 40 | 2-Stroke | 1985–1991 | 6H4-41114-A0-00 | |
| Yamaha | 40E (6H4) | 40 | 2-Stroke | 1986 | 6H4-41114-A0-00 | |
| Yamaha | 40H (6H40) | 40 | 2-Stroke | 1990–1991 | 6H4-41114-A0-00 | |
| Yamaha | 40HE (6H4) | 40 | 2-Stroke | 1993 | 6H4-41114-A0-00 | |
| Yamaha | 50ETN (6H5) | 50 | 2-Stroke | 1984 | 6H4-41114-A0-00 | |
| Yamaha | 50D (6H5) | 50 | 2-Stroke | 1985–1991 | 6H4-41114-A0-00 | |
| Yamaha | 50D (6H50) | 50 | 2-Stroke | 1990–1991 | 6H4-41114-A0-00 | |
| Yamaha | 50DE (6H5) | 50 | 2-Stroke | 1993 | 6H4-41114-A0-00 |
Technical Specs
- Product Type
- Exhaust Cover Gasket
- Installation
- Direct replacement
- OEM Part Number
- 6H4-41114-A0-00
- Supersedes
- 6H4-41114-00-00
- Dimensions
- 29.5" L x 11.5" W x 0.5" H
What’s in the Box
- 1 x Exhaust Cover Gasket (6H4-41114-A0-00)
Installation Notes
- Ensure the engine is off, cool to the touch, and the battery is disconnected.
- Locate and unbolt the exhaust cover housing, keeping track of fasteners and their positions.
- Carefully remove the old, brittle gasket. Use a plastic scraper or appropriate tool to clean any residue from the mating surfaces.
- Verify that both the cover and engine block surfaces are clean, dry, and free of oil or debris before proceeding.
- Position the new gasket correctly. Ensure all bolt holes are properly aligned.
- Reinstall the exhaust cover. Tighten the bolts in a crisscross pattern to the manufacturer-specified torque to ensure an even seal.
- After reassembly, reconnect the battery and run the engine, checking carefully for any signs of exhaust leaks around the cover.
Troubleshooting & FAQ
How do I know if this gasket fits my Yamaha outboard?
The best way to confirm fitment is to check your engine's model number and year against the compatibility table on this page. You can also match the OEM part number 6H4-41114-A0-00 or its predecessor 6H4-41114-00-00 with your existing part or service manual.
What are signs of a failing exhaust cover gasket?
Common symptoms include visible exhaust fumes or water leaking from the exhaust cover seam, an unusually loud engine noise, a rough idle, or a decrease in engine performance due to improper backpressure.
Does this gasket require sealant during installation?
Generally, this type of gasket is designed to be installed dry. Applying sealant can sometimes interfere with a proper seal unless explicitly required by your engine's service manual. Always clean both mating surfaces thoroughly before installation.
Is this an OEM part?
This listing is for a high-quality aftermarket replacement, not an original OEM part. It is engineered to meet or exceed OEM specifications using comparable materials and is manufactured in an ISO 9001 certified facility to ensure quality and consistency.
What are your shipping speeds and costs?
We ship worldwide. Typical transit time is 5–15 days for most regions. Standard shipping is free, 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. Should an issue arise, please contact our support team with your order number. Returns are accepted within our standard return window for items that are unused and in their original packaging. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything is different—even if your model is listed as compatible—do not order.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is highly recommended for safety, performance, and to prevent engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions in 5–15 days, getting you back on the water faster.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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