1. Boat Outboard Engines To Buy
  2. sku: 22931044433371602
  3. MERCURY 10-4000380

MERCURY 10-4000380 Outboard Screw Bolt

fits make: Mercury.

10-4000380 Mercury Genuine Outboard Screw New Oem Bolt

( Manufacturer Part Number: 10-4000380 ), ( Part Type: Screw Bolt ), ( Country Of Origin: United States )

Review MERCURY Genuine Outboard Screw New Oem Bolt

The **Mercury 10-4000380 Outboard Screw Bolt** is a precision-engineered fastener specifically designed for high-performance Mercury outboard motors, ensuring optimal performance, durability, and reliability in demanding marine environments. Crafted from high-grade **marine-grade stainless steel**, this bolt is engineered to withstand the corrosive effects of saltwater, humidity, and constant exposure to the elements, making it an ideal choice for both recreational and professional boating applications. Its robust construction features a **fine-threaded design**, which provides superior clamping force and prevents loosening under vibration, a critical factor in the high-stress conditions of outboard motors. The bolt is finished with a **protective coating** that enhances resistance to rust and wear, extending its service life while maintaining the integrity of the motor s internal components.

This screw bolt is meticulously manufactured to meet Mercury s stringent quality standards, ensuring a perfect fit within the motor s propulsion system. Its **hex head design** allows for easy installation and removal with standard wrenches or sockets, while its **smooth, polished threads** minimize friction and prevent galling, which can compromise the bolt s grip over time. The bolt s **precise dimensions** including its length, thread pitch, and shank diameter are calibrated to align seamlessly with Mercury s proprietary mounting hardware, guaranteeing a secure and leak-free connection between the outboard s critical components. Whether used in the lower unit, trim system, or other high-stress areas of the motor, this bolt delivers the strength and precision required to maintain peak performance under the most demanding operating conditions.

For boaters who demand nothing less than the best in marine engineering, the **Mercury 10-4000380 Outboard Screw Bolt** represents a testament to reliability and craftsmanship. Its combination of corrosion resistance, structural integrity, and compatibility with Mercury s outboard systems makes it an essential replacement part for any motor owner seeking to preserve the longevity and efficiency of their equipment. By choosing this bolt, users can trust that their outboard will continue to operate smoothly, reducing the risk of mechanical failure and ensuring a safe, enjoyable boating experience for years to come.

The **Mercury 10-4000380** is a replacement outboard screw bolt, specifically designed for certain Mercury outboard motors. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Mercury 10-4000380 Outboard Screw Bolt**

1. **OEM Quality and Fit**

The bolt is manufactured to Mercury s original equipment specifications, ensuring a precise fit with no gaps or misalignment. This reduces the risk of improper installation, which can lead to leaks, vibration, or damage to the motor s internal components.

2. **Durability and Corrosion Resistance**

Mercury outboard parts are typically made from high-grade materials, including stainless steel or coated bolts, which resist corrosion especially important for marine environments where saltwater exposure is common. This extends the bolt s lifespan and maintains the integrity of the motor.

3. **Compatibility with Mercury Motors**

This part is designed specifically for Mercury outboards, meaning it will work seamlessly with the motor s existing hardware and mounting system. Cross-brand parts may not align correctly, leading to potential issues.

4. **Easy Installation**

Since it is a direct replacement, replacing the bolt requires minimal tools and technical skill. Most users can install it themselves without professional assistance, saving labor costs.

5. **Prevents Leaks and Damage**

A faulty or missing screw bolt can cause water leaks, which may damage the motor s electrical components or lead to overheating. Replacing it with an OEM part ensures a proper seal and prevents such issues.

6. **Warranty Coverage**

If purchased from an authorized dealer or directly from Mercury, the bolt may still be covered under the manufacturer s warranty, providing peace of mind against defects.

7. **Availability and Reliability**

Mercury is a well-established brand with a vast distribution network, making this part widely available through dealers, online retailers, and marine supply stores. There s less risk of ordering a counterfeit or incompatible part.

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### **Cons of buying a Mercury 10-4000380 Outboard Screw Bolt**

1. **Cost**

As an OEM part, the Mercury 10-4000380 is likely more expensive than aftermarket alternatives. While the price difference may be minimal for a single bolt, purchasing multiple parts or parts for older models could add up.

2. **Limited Use Case**

This bolt is specific to certain Mercury outboard models (e.g., Verado, FourStroke, or older models depending on the year). If you have a different brand or a non-Mercury model, this part won t be compatible, requiring you to search for an alternative.

3. **Potential Overkill for Minor Issues**

If the bolt is loose or damaged due to normal wear rather than a critical failure, replacing it may be unnecessary. In such cases, tightening or lubricating the existing bolt could suffice, saving money and reducing waste.

4. **Lead Times for Replacement Parts**

While Mercury parts are reliable, there may be occasional delays in shipping, especially if ordering from a dealer or specialty supplier. This could cause temporary downtime if you re in a hurry to repair your motor.

5. **Risk of Counterfeit Parts**

Purchasing from unauthorized sellers (e.g., third-party online marketplaces) increases the risk of receiving a counterfeit or low-quality replica. Always buy from reputable sources to avoid this issue.

6. **Environmental Concerns**

Like all mechanical parts, bolts have a finite lifespan and contribute to waste when replaced. However, this is a minor consideration compared to the functional benefits of using a genuine part.

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### **Conclusion**

The **Mercury 10-4000380 outboard screw bolt** is a high-quality, reliable replacement part that ensures proper fit, durability, and compatibility with Mercury outboards. Its advantages such as OEM specifications, corrosion resistance, and ease of installation outweigh the minor drawbacks, particularly for owners who prioritize long-term performance and motor longevity.

The primary downsides (cost and limited use case) are outweighed by the peace of mind and functional benefits it provides. If you re dealing with a genuine issue (e.g., a broken or missing bolt causing leaks or damage), this is the safest and most effective solution.

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### **Recommendation**

**Buy the Mercury 10-4000380 if:**

- You own a Mercury outboard motor that requires this specific part.

- You re experiencing symptoms like leaks, vibration, or difficulty removing the outboard cover, indicating a faulty bolt.

- You prefer OEM parts for reliability and warranty coverage.

- You re comfortable purchasing from an authorized dealer or Mercury s official website to avoid counterfeit parts.

**Avoid or consider alternatives if:**

- You re unsure whether the bolt is the actual issue (consult a mechanic first).

- You re working with a non-Mercury outboard and need a compatible alternative.

- You re on a tight budget and can find a high-quality aftermarket bolt (e.g., from brands like **Seafoam, Star Tron, or Marine Parts One**) that fits your motor.

For most users, the **Mercury 10-4000380 is the best choice** due to its proven performance and compatibility. Always verify the part number and model compatibility before purchasing to ensure you re getting the right fit.

Details:

Genuine Mercury Outboard Screw/Bolt, Part Number 10-4000380, Please verify compatibility with a dealer before purchase.

part #: 104000380 prices

  • $13.43-$26.89

specifications ouboaen:

  • for makes: Mercury
  • mpn: 10-4000380
  • part type: Screw Bolt
  • country of origin: United States

offer ouboaen:

  • availability: In Stock
  • options: Ship-to-home
  • quantity: 1
  • sold: 0
  • started: March 28, 2026

shipping ouboaen:

  • service: USPS Ground Advantage, USPS Priority Mail
  • transit: 4-9 Days
  • class: Standard, Expedited
  • carrier: USPS
  • type: Fixed
  • cost: $0.00

payments ouboaen:

  • credit card: Diners-club
  • wallet: Apple-pay
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returns ouboaen:

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

seller ouboaen:

  • city: Elizabethton, Tennessee
  • # reviews: 10929
  • rating: 99.7%

general ouboaen:

  • condition: New
  • Boat Parts > Outboard Engines Components > Other
for makes: mercury, part type: screw bolt, country of origin: united states,
category: boat parts > outboard engines components, sku: 22931044433371602,
Mercury 10-4000380 Is Similar To:
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3 offers $13.43–$26.89 USD
  • New other (see details). Offer #1 priced at $24.99 + $0.00 shipping estimate = $24.99* total. Item must be in original, uninstalled condition with no modifications. Are these genuine OEM parts?.FREE SHIPPING
  • New other (see details). Offer #2 priced at $13.43 + $18.77 shipping estimate = $32.20* total. Spare Parts. GENUINE Quicksilver Spare Part.+$18.77 shipping
  • Used. Offer #3 priced at $26.89 + $24.70 shipping estimate = $51.59* total. Removed from a year 2001 Mariner 40.+$24.70 shipping

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