YAMAHA 93310-422C8 Rd Tz Dt Ty Et Big End Rod Bearing Nos CT/AT/DS7/TD3 Rd/tz/dt/mx/ty/yz/et

( Manufacturer Part Number: 93310-422C8 ), ( Type: Rod Bearing ), ( Country Of Origin: Japan )

Review YAMAHA Ct/at/ds7/td3 Rd/tz/dt/mx/ty/yz/et Big End Rod Bearing Nos fits MX YZ

The **Yamaha 93310-422C8 CT/AT/DS7/TD3 RD/TZ/DT/MX/TY/YZ/ET Big End Rod Bearing** is a precision-engineered, high-performance component designed exclusively for Yamaha outboard motors spanning a wide range of models, including two-stroke and four-stroke variants such as the CT, AT, DS7, TD3, RD, TZ, DT, MX, TY, YZ, and ET series. Crafted from Yamaha s proprietary materials, this bearing is engineered to withstand the intense mechanical stresses and thermal loads inherent in high-revving, high-output engines, ensuring optimal power transfer and longevity under demanding conditions. The bearing features a robust, interference-fit design that minimizes axial and radial play, reducing wear on the crankshaft and connecting rod assembly while maintaining smooth operation even at peak performance levels. Its seamless integration with Yamaha s proprietary lubrication system ensures consistent protection against friction and premature failure, making it an essential upgrade for enthusiasts seeking enhanced reliability and performance in their outboards. Whether used in stock applications or as part of a performance modification, this bearing delivers superior durability, precision, and efficiency, reinforcing the engine s structural integrity and extending its operational lifespan. Built to meet Yamaha s stringent quality standards, it combines advanced metallurgy with meticulous machining to provide a tight, consistent fit across the specified engine models, ensuring compatibility without compromising performance. Ideal for both maintenance and performance-focused applications, this bearing is a critical component for maintaining peak engine health in Yamaha outboards, where reliability and power are paramount.

### **Pros and Cons of buying a Yamaha 93310-422C8 CT/AT/DS7/TD3 RD/TZ/DT/MX/TY/YZ/ET Big End Rod Bearing (NOS)**

This part is a **New Old Stock (NOS) big end rod bearing** designed for various Yamaha outboard motors, including two-stroke and four-stroke models (CT, AT, DS7, TD3, RD, TZ, DT, MX, TY, YZ, ET series). Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **High Quality and Durability**

- Yamaha is known for manufacturing reliable marine components, and NOS parts are often sourced from discontinued or excess inventory that was never used. This means they are typically in excellent condition, with no wear or damage from installation.

- The big end rod bearing is a critical component that supports the crankshaft and piston rod, reducing friction and preventing premature engine failure. A high-quality bearing ensures smoother operation and longer engine life.

2. **Compatibility with Multiple Yamaha Models**

- This bearing is designed to fit a wide range of Yamaha outboards, including both two-stroke (e.g., TZ, TY, YZ) and four-stroke (e.g., CT, AT, DS7, TD3) models. This makes it a versatile upgrade or replacement option for owners of different Yamaha engines.

3. **New Condition (NOS Advantage)**

- Unlike used or refurbished parts, NOS bearings are unopened and unused, ensuring they meet the original manufacturer s specifications. This reduces the risk of hidden defects or premature failure compared to aftermarket or salvaged parts.

4. **Potential Cost Savings**

- NOS parts can sometimes be cheaper than brand-new parts, especially if they were part of a discontinued line or surplus stock. This makes them an attractive option for budget-conscious buyers who still want a high-quality replacement.

5. **Easier Installation and Fitment**

- Since NOS parts are designed to exact specifications, they should fit seamlessly into the engine without requiring modifications. This reduces the risk of installation errors that could lead to further damage.

6. **Support for Classic or Vintage Engines**

- For older Yamaha models that are no longer in production, NOS parts are often the only reliable option for restoring or maintaining the engine. This is particularly valuable for collectors or enthusiasts who prioritize authenticity and performance.

7. **Reduced Engine Wear and Improved Performance**

- A properly functioning big end rod bearing minimizes friction in the crankshaft assembly, which can improve engine efficiency, reduce oil consumption, and prevent catastrophic failure (e.g., rod snapping). This is especially important in high-performance or heavily used outboards.

8. **Warranty or Return Options (Depending on Seller)**

- Reputable sellers of NOS parts may offer warranties or return policies, providing peace of mind for buyers. Always verify the seller s reputation before purchasing.

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### **Cons**

1. **Limited Availability**

- NOS parts are not always in stock, and availability can be unpredictable. This may require patience or multiple sourcing attempts to secure the part, especially for older or less common models.

2. **Potential for Overpaying**

- While NOS parts can be cost-effective, some sellers may price them higher than comparable new or aftermarket alternatives due to their "premium" NOS status. Buyers should compare prices across different sellers to ensure they are getting a fair deal.

3. **No Guarantee of Long-Term Availability**

- If the seller goes out of business or the part becomes unavailable, there may be no recourse for obtaining a replacement. Buyers should consider purchasing extra parts if possible or verify the seller s reliability.

4. **Mixed Quality Perceptions**

- Some buyers may question whether NOS parts are truly "new" or if they have been previously used or tested. While reputable sellers ensure authenticity, there is always a risk of counterfeit or mislabeled parts if purchasing from untrusted sources.

5. **Installation Complexity**

- Replacing a big end rod bearing requires mechanical skill and access to the engine s internal components. Improper installation (e.g., incorrect lubrication, misalignment, or overtightening) can damage the engine or void warranties. Buyers may need to consult a mechanic or have the work done professionally.

6. **Compatibility Verification Required**

- While the bearing is designed for multiple models, not all Yamaha engines use the exact same bearing. Buyers must double-check the part number and engine specifications to ensure a perfect fit. Mixing up parts can lead to performance issues or damage.

7. **Environmental Concerns**

- NOS parts may contribute to waste if they are not used or if they sit in inventory for extended periods. Buyers should consider the environmental impact of purchasing NOS over new or refurbished alternatives.

8. **Potential for Counterfeit Parts**

- The NOS market can be flooded with counterfeit or reconditioned parts sold as "new." Buyers should purchase from well-known dealers with a track record of authenticity to avoid receiving substandard or used components.

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### **Conclusion**

The Yamaha 93310-422C8 big end rod bearing (NOS) is a **high-quality, reliable replacement part** for a wide range of Yamaha outboards. Its advantages such as durability, compatibility, and new condition make it an excellent choice for owners seeking to maintain or upgrade their engines. However, potential drawbacks like limited availability, pricing concerns, and installation complexity must be carefully considered.

For **enthusiasts, collectors, or those restoring vintage engines**, this bearing is a strong recommendation due to its authenticity and performance benefits. For **casual boaters or those on a tight budget**, it may be worth comparing prices with new or aftermarket alternatives to ensure the best value.

### **Recommendation**

- You need a high-quality, authentic replacement for a Yamaha engine.

- You are restoring or maintaining a classic or discontinued model.

- You have verified the seller s reputation and part authenticity.

- You are prepared to handle installation carefully or seek professional help.

- You are looking for the absolute lowest price and can find a comparable new or aftermarket bearing.

- You are unsure about the exact compatibility of the part with your engine model.

- You lack mechanical experience and are uncomfortable with installation.

Always **cross-reference the part number with your engine s specifications** and purchase from a trusted source to ensure a successful upgrade.

Details:

YAMAHA CT/AT/DS7/TD3//RD/TZ/DT/MX/TY/YZ/ET BIG END ROD BEARING NOS. PART NUMBER 93310-422C8.

part #: 93310422c8 prices

• $28.89-$46.99

specifications bearingmotorcycleiz:

• for models: Mx, Yz
• for makes: Yamaha
• mpn: 93310-422c8
• type: Rod Bearing
• country of origin: Japan

payments bearingmotorcycleiz:

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

seller bearingmotorcycleiz:

• # reviews: 17704
• rating: 99.9%
• city: Waterford, Michigan

returns bearingmotorcycleiz:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

offer bearingmotorcycleiz:

• started: April 12, 2026
• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home

shipping bearingmotorcycleiz:

• type: Fixed
• carrier: USPS
• transit: 4-8 Days
• cost: $0.00
• class: Standard
• service: USPS First Class

general bearingmotorcycleiz:

• condition: New
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Bearings

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