YAMAHA 6CE-11120-12-9S Port Left Cylinder Head Cams 4.2L

( Manufacturer Part Number: 6CE-11120-12-9S ), ( Part Type: Cylinder Head Cam ), ( Country Of Origin: Japan )

Review YAMAHA Stroke 4.2l Port Left Cylinder Head Cams Pn fits F300

The **Yamaha 6CE-11120-12-9S F300 4.2L Port Left Cylinder Head with Cams** is a high-performance, precision-engineered component designed exclusively for Yamaha s legendary F300 outboard motors, specifically tailored to the 4.2-liter inline four-cylinder models. This meticulously crafted cylinder head assembly represents the pinnacle of marine engine reliability and efficiency, featuring a robust **aluminum alloy construction** that balances lightweight performance with exceptional durability. The head incorporates a **ported left-side configuration**, allowing for optimized airflow and improved combustion efficiency, which translates to enhanced throttle response, smoother power delivery, and reduced emissions critical factors for both performance enthusiasts and those seeking long-term engine longevity. The integrated **cams** (camshafts) are precision-machined to ensure precise valve timing, minimizing friction and maximizing engine breathing, while the **intake and exhaust ports** are strategically designed to enhance volumetric efficiency, delivering a noticeable boost in horsepower and torque. Built to Yamaha s stringent quality standards, this cylinder head is engineered to withstand the demanding conditions of marine environments, including exposure to saltwater corrosion, high temperatures, and constant vibration. Whether you're restoring a classic F300, upgrading an existing engine, or maintaining a high-performance setup, this OEM-quality part ensures a seamless fit and performance that rivals or exceeds factory specifications. Ideal for mechanics, boat owners, and performance tuners, the **6CE-11120-12-9S** is a must-have replacement for those seeking uncompromising power, precision, and dependability in their Yamaha outboard.

### **Pros and Cons of buying a Yamaha 6CE-11120-12-9S F300 (4.2L Port Left Cylinder Head & Cams)**

1. **High Performance and Reliability** The F300 engine is a well-regarded marine outboard, known for its strong power output (up to 300 HP in some configurations) and durability. Yamaha s reputation for quality ensures a robust build.

2. **Compatibility with Yamaha s Ecosystem** This part is designed specifically for Yamaha outboards, meaning it integrates seamlessly with other Yamaha components, reducing compatibility issues.

3. **Aftermarket Support** As a Yamaha engine, it benefits from a wide range of aftermarket parts, tuning options, and performance upgrades, making maintenance and modifications easier.

4. **Fuel Efficiency (Compared to Similar Engines)** The 4.2L inline-six design balances power and efficiency, which can be advantageous for medium to large boats where fuel economy matters.

5. **Resale Value** Yamaha engines hold their value well, so if you decide to upgrade later, you may recover a significant portion of your investment.

6. **Durability of Materials** The cylinder head and cams are precision-engineered components, built to withstand high stress and prolonged use, especially in marine environments.

7. **Warranty Coverage** If purchased new or from an authorized dealer, it may come with Yamaha s warranty, providing peace of mind against defects.

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1. **High Cost** Replacement cylinder heads and camshafts for a 4.2L Yamaha engine are expensive, often costing several thousand dollars, especially if labor is included. This can be a significant investment for boat owners.

2. **Specialized Labor Requirements** Installing or repairing these components requires skilled marine mechanics familiar with Yamaha s specific designs. DIY attempts may lead to further damage or improper fitting.

3. **Potential for Complexity** The 4.2L inline-six engine is more complex than smaller outboards, meaning more parts to inspect, maintain, or replace over time. This can increase long-term ownership costs.

4. **Limited Availability of Used Parts** While Yamaha parts are widely available, finding high-quality used cylinder heads or cams can be challenging, and quality may vary.

5. **Weight and Space Considerations** The engine and its components are heavy, which may require additional structural reinforcement in the boat s engine compartment.

6. **Environmental and Maintenance Demands** Marine engines are exposed to saltwater corrosion, which accelerates wear on components like cams and cylinder heads. Regular maintenance is critical to prevent premature failure.

7. **Potential for Overkill** If the boat s intended use is light-duty (e.g., leisure cruising), the power and complexity of the F300 may be unnecessary, leading to higher costs without proportional benefits.

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The **Yamaha 6CE-11120-12-9S F300 (4.2L port left cylinder head and cams)** is a high-performance, reliable component ideal for boats requiring significant power and durability. It excels in performance, compatibility, and long-term value but comes with a steep price tag, specialized labor needs, and increased maintenance demands. Whether this purchase is justified depends on your boat s usage, budget, and long-term goals.

If you re running a **high-performance or large displacement boat** (e.g., a performance cruiser, fishing vessel, or racing boat) where power and reliability are critical, the investment may be worthwhile. However, if your boat s needs are modest or you re on a tight budget, alternatives like a smaller Yamaha engine or used components could be more practical.

- **Buy if:** You need a powerful, long-lasting engine for demanding applications (e.g., heavy fishing, racing, or high-speed cruising) and can afford the upfront and maintenance costs.

- **Consider alternatives if:** Your boat s requirements are less intensive, or you prefer a lower-cost solution (e.g., a used cylinder head, a different engine model, or a less complex setup).

- **Prioritize:** Always verify the condition of the used parts, confirm compatibility with your boat s existing engine, and consult a Yamaha-certified mechanic before purchasing or installing.

For best results, obtain multiple quotes, check for warranty options, and weigh the long-term benefits against the immediate expense.

Details:

part #: 6ce11120129s prices

• $200.00-$699.99

specifications ouboaen:

• for models: F300
• for makes: Yamaha
• mpn: 6ce-11120-12-9s
• part type: Cylinder Head Cam
• country of origin: Japan

general ouboaen:

• Boat Parts > Outboard Engines Components > Powerhead Components
• condition: For parts or not working

seller ouboaen:

• city: Jensen Beach, Florida
• rating: 100.0%
• # reviews: 28

offer ouboaen:

• quantity: 1
• best offers: True
• options: Ship-to-home
• started: March 20, 2026
• availability: In Stock
• sold: 0

payments ouboaen:

• credit card: Diners-club
• other
• wallet: Apple-pay
• money order

shipping ouboaen:

• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• transit: 6-11 Days
• carrier: FedEx
• type: Calculated
• cost: $49.60

returns ouboaen:

• policy: No Returns

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