Cylinder Seal – Fits Yamaha 30–40 HP 4-Stroke Outboards (Replaces 67C-11356-00-00)
Cylinder Seal – Fits Yamaha 30–40 HP 4-Stroke Outboards (Replaces 67C-11356-00-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Cylinder Seal – Fits Yamaha 30–40 HP 4-Stroke Outboards (Replaces 6...
Product Details
This aftermarket Cylinder Seal provides a secure fit for Yamaha 4-stroke outboard engines, specifically 30–40 HP, 3-cylinder F30A and F40A models manufactured between 2000 and 2009. It is engineered to create a reliable seal for the engine's cylinder #2, preventing leaks and ensuring proper compression.
It serves as a direct replacement for Yamaha OEM part number 67C-11356-00-00.
- Installs on the engine cylinder cover.
- Specifically designed as the seal for cylinder #2.
- Engineered to meet or exceed original equipment specifications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 67C-11356-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F30A | 30 | 4-Stroke | 2000–2009 | 67C-11356-00-00 | 3-cylinder engine |
| Yamaha | F40A | 40 | 4-Stroke | 2000–2009 | 67C-11356-00-00 | 3-cylinder engine |
Technical Specs
- Product Type
- Cylinder Seal
- Installation
- Engine Cylinder Cover
- Dimensions
- 8.0" H x 12.0" W x 0.25" L
- Other Technical Attributes
- Seal for cylinder #2
What’s in the Box
- 1 x Seal, Cylinder 2 (Replaces 67C-11356-00-00)
Installation Notes
- Disconnect the battery and ensure the engine is cool.
- Remove the engine cowling to access the powerhead.
- Carefully remove the cylinder head cover and any components blocking it.
- Using a pick or small flathead screwdriver, gently remove the old cylinder seal from its groove.
- Thoroughly clean the groove, ensuring it is free of debris, oil, and old sealant residue.
- Lubricate the new seal with a small amount of clean engine oil or grease.
- Carefully press the new seal into the groove, ensuring it is fully seated and not twisted.
- Reinstall the cylinder head cover, torquing bolts to the manufacturer's specified sequence and values.
- Reconnect all components and the battery, then check for leaks upon startup.
Troubleshooting & FAQ
How do I confirm this seal fits my Yamaha outboard?
This seal is designed for Yamaha F30A and F40A (30-40 HP, 4-stroke) models from 2000–2009. Cross-reference your engine model and year with the "Engine & Model Compatibility" table. Also, verify that your existing part number is 67C-11356-00-00.
What are the signs of a failing cylinder seal?
Common symptoms include external oil or coolant leaks around the cylinder head cover, engine overheating, a loss of compression in cylinder #2, or poor engine performance. A visual inspection may reveal a cracked, brittle, or flattened seal.
When should this seal be replaced?
This seal should be replaced any time the cylinder head cover is removed for service. It is also recommended to replace it as part of a major engine overhaul or if any signs of leakage or failure are detected.
Is this the only seal I need for the cylinder head cover?
This seal is specifically for cylinder #2, indicated as position #10 in many service diagrams. Other seals and gaskets are typically required for a complete cylinder head service. Consult your service manual for a full list of required parts.
Is any special tool required for installation?
No special tools are required to install the seal itself, but you will need standard mechanic's tools (socket set, torque wrench) to remove and reinstall the cylinder head cover correctly. A pick tool can be helpful for removing the old seal.
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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