Yamaha 63P-11110-10-9S – Cylinder Head Assembly

Yamaha 63P-11110-10-9S – Cylinder Head Assembly

Restore Top-End Performance with a Genuine Yamaha Cylinder Head

The Yamaha 63P-11110-10-9S – Cylinder Head Assembly is a factory-engineered replacement that ensures precise combustion control, optimal compression, and consistent outboard performance. Built to Yamaha’s exacting standards, this component directly affects your engine’s power output, efficiency, and reliability—making it essential for maintaining top-end integrity.

Whether you're completing a major overhaul or replacing a damaged part, this OEM cylinder head assembly provides long-lasting durability and factory-matched fitment for select Yamaha models.

Key Features

Genuine OEM Yamaha Part

Engineered by Yamaha for exact fit and function—no modification required.

Supports Proper Combustion & Compression

Helps maintain the correct air-fuel mixture and chamber sealing for optimal engine performance.

Machined for Precision

Features accurate valve seat placement and porting for consistent cylinder firing.

Built to Withstand Marine Environments

Manufactured using corrosion-resistant materials to endure harsh saltwater conditions.

Ideal Use Cases

Replacing a damaged or cracked cylinder head

Conducting a major engine rebuild or top-end service

Restoring compression and overall motor efficiency

Why Cylinder Head Quality Matters

Your outboard’s cylinder head plays a crucial role in combustion, cooling, and compression. A genuine Yamaha head like the 63P-11110-10-9S guarantees perfect sealing, alignment, and airflow, protecting engine performance and fuel economy. Using inferior aftermarket heads can lead to misfires, overheating, and premature failure—costing you more in the long run.

Frequently Asked Questions

Is the Yamaha 63P-11110-10-9S a complete cylinder head assembly?

Yes, this part includes the full OEM cylinder head assembly as specified by Yamaha. Internal components like valves may be sold separately depending on your engine setup.

How can I verify this fits my engine?

Simply check your Yamaha outboard’s parts diagram or send us your engine model and serial number for quick confirmation.

When should I replace the cylinder head?

It should be replaced if it’s cracked, warped, or causing compression loss—especially after overheating or long-term wear.