1. Boat Outboard Engines To Buy
  2. sku: 21941382279036632
  3. MERCURY 31-8M0050692

MERCURY 31-8M0050692 Quicksilver Bearing Thrust 745061876330 Oem/genuine

fits model: Marine. make: Mercury.

31-8m0050692 Mercury Quicksilver Marine Bearing Thrust / 318m0050692 Oem/genuine

( Manufacturer Part Number: 31-8M0050692 ), ( Part Type: Bearing ), ( Country Of Origin: United States ), ( UPC: 745061876330 )

Review MERCURY Quicksilver Bearing Thrust 318m0050692 Oem/genuine fits MARINE

The **Mercury Marine 31-8M0050692 Quicksilver Thrust Bearing** is a high-performance, precision-engineered component designed exclusively for Mercury s outboard motors, ensuring optimal power transfer and reliability in demanding marine environments. Part of the **OE/genuine** line, this bearing is manufactured to exacting standards using durable materials, including high-grade steel and specialized coatings, to withstand the extreme forces generated during propulsion while resisting corrosion, wear, and fatigue. The **318M0050692** model is specifically engineered for compatibility with the **Quicksilver 200 HP and 250 HP outboard series**, where it plays a critical role in supporting the propeller shaft and thrust assembly, reducing friction and heat buildup to extend the lifespan of the drive system. Its robust construction features a **sealed housing** that protects internal components from water intrusion, salt corrosion, and debris, making it ideal for both freshwater and saltwater applications. The bearing s **precision-machined surfaces** and **optimized load distribution** ensure smooth operation, minimizing vibration and noise while maintaining peak efficiency even under heavy loads or prolonged use. Whether installed in a high-performance cruiser, fishing vessel, or recreational boat, this **genuine OEM replacement** delivers the same level of performance as the original equipment, helping to preserve the integrity of your Mercury outboard s drivetrain. For marine enthusiasts who demand durability, performance, and long-term reliability, the **Mercury 31-8M0050692 Quicksilver Thrust Bearing** is an essential component that upholds the brand s reputation for innovation and engineering excellence.

### **Pros and Cons of buying a Mercury 31-8M0050692 (Quicksilver Marine Bearing Thrust 318M0050692, OEM/Genuine)**

#### **Pros:**

1. **OEM/Genuine Quality** This part is manufactured by Mercury Marine, the same brand that produces your engine. OEM components are designed to meet exact specifications, ensuring proper fit, performance, and longevity. Aftermarket parts may not match the same level of precision or durability.

2. **Reliability and Durability** Mercury Marine parts are built to withstand the stresses of marine environments, including saltwater corrosion, vibration, and heavy loads. A high-quality thrust bearing like this one is less likely to fail prematurely compared to cheaper alternatives.

3. **Compatibility** This specific part (31-8M0050692) is designed for Mercury outboard motors, particularly those in the 150 250 HP range (such as the 150, 175, 200, and 250 models). Using an OEM part reduces the risk of improper fitment, which can lead to damage or reduced performance.

4. **Warranty Coverage** Purchasing from an authorized dealer or directly from Mercury ensures that the part may still be covered under the original engine warranty (if applicable) or eligible for warranty service. Aftermarket parts often void warranties.

5. **Performance Consistency** Thrust bearings play a critical role in transmitting power from the engine to the propeller shaft while handling axial loads. A genuine Mercury bearing will provide smooth operation, reducing wear on other components like the lower unit seals and shaft.

6. **Easier Installation and Maintenance** OEM parts are designed with standard tools and procedures in mind, making replacement less complicated than with non-standard aftermarket alternatives. This can save time and reduce the risk of mistakes during installation.

7. **Long-Term Cost Savings** While the upfront cost may be higher than aftermarket options, a genuine Mercury bearing is less likely to fail early, reducing the need for frequent replacements. This can be more economical over the lifespan of the engine.

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#### **Cons:**

1. **Higher Upfront Cost** OEM parts are typically more expensive than aftermarket alternatives. For example, a genuine Mercury thrust bearing may cost significantly more than a third-party equivalent. This can be a barrier for budget-conscious buyers.

2. **Limited Availability** Depending on your location, genuine Mercury parts may not be as widely stocked as aftermarket options. You may need to order from an authorized dealer, a marine supply chain, or directly from Mercury, which could involve shipping delays.

3. **Potential Overkill for Some Applications** If your engine is older or has been heavily modified, the OEM part may be more robust than necessary. In some cases, a high-quality aftermarket bearing could offer similar performance at a lower cost.

4. **Resale Value Impact** If you plan to sell your boat in the future, using OEM parts can be a selling point, as buyers often prefer genuine components. However, if you re operating on a tight budget, the higher cost upfront may not be justified if you don t plan to keep the boat long-term.

5. **Myth of "Better" Aftermarket Options** Some aftermarket brands (e.g., Seafoam, Star Tron, or reputable marine suppliers) produce high-quality bearings that may match or exceed OEM standards. While these are not *exact* OEM replacements, they can be a cost-effective alternative if thoroughly researched.

6. **Potential for Counterfeit Parts** If purchasing from untrusted sources (e.g., eBay, unlicensed sellers, or gray-market dealers), there is a risk of receiving counterfeit or substandard parts. Always buy from authorized dealers or verified suppliers to avoid this.

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### **Conclusion:**

The **Mercury 31-8M0050692 (Quicksilver Marine Bearing Thrust 318M0050692) is a high-quality, reliable OEM part** that offers superior fit, performance, and longevity compared to most aftermarket alternatives. It is the best choice if:

- You prioritize **long-term reliability** and want to avoid premature failure.

- Your engine is still under warranty, and you want to maintain coverage.

- You value **exact compatibility** and ease of installation.

- You are willing to pay a premium for **brand assurance**.

However, if **cost is a major concern** and you ve researched reputable aftermarket brands (e.g., those with marine-specific certifications and strong warranties), a high-quality alternative *could* be a viable option **but only if it meets or exceeds OEM standards in durability and fit**.

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### **Recommendation:** - **Buy the OEM part (31-8M0050692) if:**

- You are replacing a failed bearing in a **high-hour or performance-critical engine**.

- You want to **maximize reliability** and minimize the risk of further damage to your lower unit.

- You are working with an **authorized Mercury dealer** to ensure authenticity.

- Your budget allows for the higher upfront cost, as it will likely save you money in the long run.

- **Consider a high-quality aftermarket alternative if:**

- You ve **verified the aftermarket bearing** is from a trusted brand (e.g., one with marine-specific testing and warranties).

- Your engine is **older or lightly used**, and you re looking to **save money without sacrificing performance**.

- You are **not under warranty** and want to avoid voiding any remaining coverage.

- You ve **researched user reviews** and technical specifications to confirm the aftermarket part is equivalent in load capacity and material quality.

**Final Note:** If in doubt, consult a **marine mechanic or Mercury dealer** before purchasing. A failed thrust bearing can cause significant damage to your lower unit, so prioritize **quality over cost savings** when it comes to critical components like this.

Details:

Mercury Quicksilver Marine Bearing Thrust 31-8M0050692 / 318M0050692 OEM/Genuine. Shipped with USPS Ground Advantage.

part #: 318m0050692 prices

  • $26.03-$28.88

specifications ouboaen:

  • for models: Marine
  • for makes: Mercury
  • mpn: 31-8m0050692
  • part type: Bearing
  • country of origin: United States
  • upc: 745061876330

seller ouboaen:

  • city: Homestead, Florida
  • rating: 100.0%
  • # reviews: 52

general ouboaen:

  • condition: New other see details
  • Boat Parts > Outboard Engines Components > Other

shipping ouboaen:

  • cost: $5.77
  • service: USPS Ground Advantage
  • carrier: USPS
  • class: Standard
  • transit: 3-10 Days
  • type: Calculated

offer ouboaen:

  • best offers: True
  • sold: 0
  • started: February 11, 2026
  • options: Ship-to-home
  • quantity: 1
  • availability: In Stock

payments ouboaen:

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

returns ouboaen:

  • policy: No Returns
for models: marine, for makes: mercury, part type: bearing, country of origin: united states,
category: boat parts > outboard engines components, sku: 21941382279036632,
Mercury 31-8M0050692 Is Similar To:
ouboaen logo
2 offers $26.03–$28.88 USD
  • New. Offer #1 priced at $28.88 + $0.00 shipping estimate = $28.88* total. Mercury Quicksilver Marine Bearing Thrust / 318M0050692 OEM/Genuine.FREE SHIPPING
  • New other (see details). Offer #2 priced at $26.03 + $6.24 shipping estimate = $32.27* total. Shipped with USPS Ground Advantage.+$6.24 shipping

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