Cylinder Head Cover – Fits Yamaha Outboard E40 & 40HP Engines (Replaces 6F6-11191-00-1S)
Cylinder Head Cover – Fits Yamaha Outboard E40 & 40HP Engines (Replaces 6F6-11191-00-1S) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Cylinder Head Cover – Fits Yamaha Outboard E40 & 40HP Engines (...
Product Details
This aftermarket Cylinder Head Cover – Fits Yamaha Outboard E40 & 40HP Engines and is engineered for Yamaha 40HP (29.4kW), 2-stroke outboard motors. It is compatible with E40 series engines including E40GMH/S/L, E40JMH, E40JWH, 40GWH, and 40JWH models across multiple years of production.
It serves as a direct cross-reference for Yamaha OEM part numbers 6F6-11191-00-1S and 6F6-11191-00-9M.
- Installs as a direct OEM-style replacement.
- Constructed from durable aluminum alloy for marine environments.
- Designed for gasoline (petrol) 2-stroke outboard engines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6F6-11191-00-1S | Superseded by 6F6-11191-00-9M. |
| Yamaha | 6F6-11191-00-9M | Current replacement part number. |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | E40GMH | 40 | 2-Stroke | 6F6-11191-00-1S | |
| Yamaha | E40GMS | 40 | 2-Stroke | 6F6-11191-00-1S | |
| Yamaha | E40GML | 40 | 2-Stroke | 6F6-11191-00-1S | |
| Yamaha | E40JMH | 40 | 2-Stroke | 6F6-11191-00-1S | |
| Yamaha | E40JWH | 40 | 2-Stroke | 6F6-11191-00-1S | |
| Yamaha | 40GWH | 40 | 2-Stroke | 6F6-11191-00-1S | |
| Yamaha | 40JWH | 40 | 2-Stroke | 6F6-11191-00-1S |
Technical Specs
- Product Type
- Cylinder Head Cover
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline (Petrol)
- Housing Material
- Aluminum alloy
- Housing Color
- Silver/Gray (unpainted metal)
- Dimensions
- Length: 25.0 cm, Width: 2.0 cm, Height: 12.0 cm
- Weight
- 0.32 kg (0.7 lb)
- Warranty
- Varies by seller
- Other Technical Attributes
- Designed for optimal engine performance and protection
What’s in the Box
- 1 x Cover, Cylinder Head 1 (Replaces 6F6-11191-00-1S)
Installation Notes
- Disconnect the battery before starting work.
- Thoroughly clean the area around the cylinder head cover to prevent debris from entering the engine.
- Carefully remove any components obstructing access, such as wiring harnesses or fuel lines.
- Loosen and remove the mounting bolts from the old cover in a crisscross pattern.
- Remove the old cover and discard the old gasket.
- Clean the mating surface on the cylinder head, ensuring it is free of old gasket material and oil.
- Position the new gasket (not included, sold separately) onto the cylinder head.
- Place the new cylinder head cover into position.
- Install the mounting bolts and tighten them finger-tight.
- Torque the bolts to the manufacturer's specified values using a torque wrench, following the correct sequence.
- Reinstall any components that were removed.
- After reconnecting the battery, start the engine and inspect carefully for any oil leaks around the new cover.
Troubleshooting & FAQ
How can I confirm this cover fits my engine?
The most reliable method is to match the part number from your engine's schematics to 6F6-11191-00-1S or 6F6-11191-00-9M. You can also compare our product photos and listed models against your existing part and engine model, but part number matching is always best.
Is a new gasket included with this cover?
A gasket is not included. To ensure a leak-free seal, we strongly recommend installing a new, high-quality cylinder head gasket (sold separately) at the same time you replace the cover.
What are the signs of a failing cylinder head cover?
Common symptoms include visible oil leaks from the seam between the cover and the engine block, cracks or fractures in the cover itself, or warping that prevents a proper seal. This can lead to loss of oil and poor engine performance.
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.
Payment & Security
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