Head Cover Gasket | Replaces Yamaha 663-11193-00
Ensure a leak-free seal on your Yamaha outboard’s cylinder head with this high-quality aftermarket head cover gasket. This part is a direct replacement for the original Yamaha "Gasket, Head Cover 1," providing an airtight and watertight seal for the upper engine assembly.
Designed for 2-stroke durability, this gasket is manufactured to withstand the specific vibration and thermal demands of mid-range Yamaha outboards.
Part Number Cross-Reference
This aftermarket unit is a 100% compatible replacement for the following OEM and major manufacturer part numbers:
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Yamaha OEM: 663-11193-00-00
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Yamaha OEM: 663-11193-A0-00
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Mercury/Mariner: 27-81254M / 81254M
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Recmar: REC663-11193-00
Fitment & Compatibility
This gasket is primarily used on Yamaha 2-Stroke 55HP models, as well as select commercial and multi-cylinder variants from the late 1980s through the late 1990s.
| Horsepower |
Model / Series |
Year Range |
| 55 HP |
CV55 / C55 / 55BE / 55BM |
1989 – 1995 |
| 48 HP |
E48 (Commercial / Enduro) |
1995 – 2000 |
| 60 HP |
60 (2-Cylinder Mercury/Mariner Cross-over) |
Various |
Tech Tip: This is the Head Cover Gasket (the outer cover), not the main Cylinder Head Gasket. It is often included in the Powerhead Rebuild Kit # 663-W0001-02.
Features
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Exact Profile Match: Precision stamped to ensure all bolt holes and water passages align perfectly with the 663-series head cover.
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Marine-Grade Materials: High-temp resistant composite designed for the harsh cooling cycles of 2-stroke engines.
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Interchangeability: Fully compatible with both Yamaha-branded and Mercury-branded (Mariner) versions of the 55HP twin-cylinder block.
We appreciate your business and are committed to providing exceptional service and timely delivery. Please review the shipping information below before placing your order.
Is It In Stock?
Over 98% of the products listed on our website are in stock.
If a part is not currently in stock, we will notify you as soon as we process your order. We process all orders on the same business day they are received.
If you would like to confirm availability before placing your order, please contact us.
Packaging
Rest assured that all items will be securely packaged to minimise the risk of damage during transit. Fragile or high-value parts may be packaged with additional protective materials such as bubble wrap, foam padding, or reinforced cartons.
Where Do You Ship From?
All parts are stocked and shipped from our location at The Boat Works Marina on the Gold Coast, Australia.
Shipping Rates
Shipping rates vary based on the size, weight, and destination of the package. Estimated shipping costs are displayed during checkout before your order is placed.
Free Shipping – Australia
We offer Free Shipping on parts orders over $55 within Australia.
If you select Free Freight, your order will generally be sent using Australia Post Standard or another standard delivery service.
Australia Post standard delivery is typically 4–10 business days within Australia.
If delivery time is important, we recommend selecting one of our paid express freight services.
Please note:
- Certain items do not qualify for Free Freight. Please refer to the product description for details.
- Dangerous goods, oils, lubricants, DeFOUL, Propspeed products, batteries, and certain oversized items may be excluded from Free Freight and may require road freight services.
Order Tracking
Once your order has been dispatched, you will receive an email containing your tracking number and carrier information.
Who Do You Ship With?
We ship using:
- Australia Post
- StarTrack
- Team Global Express
- UPS
- DHL Express
- FedEx
- TNT
- Couriers Please
- Freight forwarding and brokerage services such as Transdirect
We have extensive experience shipping throughout Australia and worldwide. We will select the carrier we believe is most suitable for your location and the type of goods being shipped.
If you would prefer to use your own carrier account or would like to discuss shipping options, please contact us.
International Orders
We ship worldwide.
International orders may be subject to import duties, taxes, VAT/GST, customs clearance fees, brokerage charges, and other fees imposed by the destination country.
These charges are not included in the product price or shipping cost displayed at checkout and are the responsibility of the recipient.
Customs regulations vary by country. In some cases, customs authorities may require additional information such as a passport number, national identification number, tax identification number, or business registration number before a shipment can be cleared for delivery.
If you are unsure what charges may apply in your country, we recommend contacting your local customs office before placing an order.
