YAMAHA 93306-305U6-00 Nsk Bearing Nos

( Manufacturer Part Number: 93306-305U6-00 ), ( Part Type: Bearing )

Review YAMAHA New Oem Nsk Bearing Nos

The **Yamaha 93306-305U6-00 NSK Bearing (NSK 6305-2ZR)** is a precision-engineered, high-performance radial ball bearing designed to deliver exceptional reliability and longevity in demanding applications, particularly within Yamaha s line of outboard motors and marine propulsion systems. This bearing is part of Yamaha s proprietary **U6 series**, which incorporates advanced sealing technology and optimized internal geometry to enhance durability, reduce friction, and improve overall efficiency in wet, corrosive, and high-vibration environments. The **NSK 6305-2ZR** designation indicates a deep-groove ball bearing with a **50mm bore diameter**, **90mm outer diameter**, and a **15mm width**, featuring **two rows of balls** for superior load distribution and a **shielded (ZR) design** that protects internal components from contaminants while allowing for minimal lubricant retention. Constructed from high-grade **chromium steel**, this bearing is heat-treated to achieve an optimal hardness of **58-64 HRC**, ensuring resistance to wear, deformation, and fatigue under heavy mechanical stresses. The **sealed construction** prevents water ingress, salt corrosion, and abrasive particles from compromising the bearing s performance, making it ideal for marine applications where exposure to harsh elements is inevitable. Whether integrated into Yamaha s **outboard motors, stern drives, or other propulsion systems**, this bearing operates with minimal noise, smooth rotation, and extended service life, contributing to the overall efficiency and performance of the engine. Its compatibility with Yamaha s **U6 series** components ensures seamless integration, while its robust construction and NSK s reputation for precision engineering guarantee consistent, high-quality performance in both new and remanufactured applications.

### **Pros and Cons of buying a Yamaha 93306-305U6-00 (NSK Bearing NOS)**

1. **Original NSK Bearing (New Old Stock)** The NSK bearing is a high-quality, precision-engineered component, known for durability and reliability. NOS (New Old Stock) means it is unused but may have been stored for an extended period, ensuring it is in excellent condition.

2. **Compatibility with Yamaha Engines** This bearing is specifically designed for Yamaha outboard motors, particularly those requiring a 305U6-00 bearing, such as older models like the Yamaha 90HP, 115HP, or other mid-range outboards from the late 1990s to early 2000s. Using an OEM part reduces the risk of compatibility issues.

3. **Long-Lasting Performance** NSK bearings are manufactured to strict tolerances, reducing wear and tear on the engine s crankshaft and other components. This can extend the lifespan of the motor if installed correctly.

4. **Easier Maintenance & Replacement** Since it is a direct replacement part, swapping it out is straightforward, requiring minimal additional modifications. This makes it a convenient choice for DIY mechanics or professionals.

5. **Potential Cost Savings** While NOS parts can be expensive, they may be more cost-effective than buying a complete engine rebuild kit or a used engine. If the rest of the motor is in good condition, replacing just the bearing can be a budget-friendly solution.

6. **Reduced Risk of Premature Failure** A failing bearing can cause catastrophic engine damage. Replacing it with a high-quality NSK bearing helps prevent unexpected breakdowns, especially in high-use applications like fishing or boating.

7. **Resale Value & Authenticity** If you plan to sell the engine later, having an original NSK bearing (especially NOS) can increase its perceived value among buyers who prioritize genuine parts.

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1. **High Upfront Cost** NOS parts are typically more expensive than aftermarket or used bearings. The price may be justified by quality, but it can still be a significant investment, especially if the engine has other issues.

2. **Limited Availability** Finding NOS parts can be challenging, as they are not mass-produced like new aftermarket bearings. This may require sourcing from specialty marine parts dealers or online marketplaces, which could take time.

3. **Storage & Condition Concerns** While NOS bearings are unused, long-term storage can sometimes lead to minor issues like rust or dried-out grease. Inspecting the bearing for any signs of wear or contamination before purchase is essential.

4. **Potential Overkill for Some Engines** If the engine is older or heavily worn in other areas (e.g., crankshaft, seals, or housing), replacing just the bearing may not fully restore performance. A more comprehensive rebuild might still be needed.

5. **Installation Complexity** While straightforward, improper installation (e.g., incorrect alignment, insufficient lubrication) can lead to premature failure. This requires some mechanical skill or professional assistance.

6. **No Warranty on NOS Parts** Unlike new aftermarket parts, NOS items often come without a manufacturer warranty. If the bearing fails shortly after installation, you may be responsible for replacement costs.

7. **Environmental & Ethical Considerations** NOS parts are essentially "new" but come from old stock, which may raise questions about sustainability. Some buyers prefer fully new or recycled parts for environmental reasons.

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### **Conclusion**

The **Yamaha 93306-305U6-00 (NSK Bearing NOS)** is a high-quality, reliable choice for Yamaha outboard owners who prioritize durability and authenticity. Its advantages such as precision engineering, compatibility, and long-term performance make it ideal for those willing to invest in a long-lasting solution. However, the higher cost, limited availability, and potential need for professional installation may deter some buyers.

If your engine is otherwise in good condition and you have access to proper tools or a mechanic, this bearing is a strong recommendation. For engines with extensive wear or budget constraints, weighing the cost against the need for additional repairs is advisable.

- **Buy it if:** You need a direct OEM replacement, your engine is mostly sound, and you value the reliability of an NSK bearing. It s particularly worth it for high-use applications where engine longevity is critical.

- **Consider alternatives if:** You re on a tight budget, the engine has other major issues, or you prefer aftermarket bearings with warranties. In such cases, a high-quality aftermarket bearing (e.g., from SKF or another reputable brand) may offer a cost-effective compromise.

- **Pro Tip:** Always inspect the bearing for any signs of damage (rust, scoring, or debris) before purchasing. If possible, have a mechanic verify the rest of the engine s condition to ensure the bearing replacement will fully address your needs.

Details:

All parts are in stock and ready to ship. NSK Bearing is new and in excellent condition, original packaging. Pictures: Thumbnails. New OEM Yamaha 93306-305U6-00 NSK Bearing NOS.

If the original package is included it may show signs of wear. Items are shipped using USPS, UPS, and FedEx.

part #: 93306305u600 prices

• $40.00-$43.98

specifications bearingmotorcycleiz:

• for makes: Yamaha
• mpn: 93306-305u6-00
• part type: Bearing

payments bearingmotorcycleiz:

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• credit card: Mastercard
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offer bearingmotorcycleiz:

• availability: In Stock
• sold: 0
• best offers: True
• started: March 24, 2026
• options: Ship-to-home
• quantity: 1

shipping bearingmotorcycleiz:

• cost: $0.00
• service: USPS Ground Advantage, USPS Priority Mail Flat Rate Envelope, UPS Next Day Air, UPS 2nd Day Air
• transit: 3-8 Days
• carrier: USPS, UPS
• class: Standard, Expedited, One-day
• type: Calculated

seller bearingmotorcycleiz:

• # reviews: 131110
• rating: 99.9%
• city: Ashaway, Rhode Island

returns bearingmotorcycleiz:

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

general bearingmotorcycleiz:

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

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