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- McGard 74039 Marine Propeller Lock Set (3/4"-...
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Item #:
4590689
McGard 74039 Marine Propeller Lock Set (3/4"- 16 Thread Size) - Mercury/MerCruiser/OMC - Set of 1,Black
Item #:
4590689
BSD 97
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Imported from USA store
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Order now and get it around Saturday, August 22
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The McGard propeller lock offers 24 hour protection against costly propeller theft by its free-spinning collar and maximum security provided by naval brass and hardened stainless steel construction.
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What Stands Out
Durable Construction
Made with high-quality materials, this lock set ensures long-lasting performance and protection against corrosion, ideal for marine environments.
Easy Installation
Designed for quick and hassle-free installation on Mercury, MerCruiser, and OMC engines, allowing users to secure their propellers efficiently.
Enhanced Security
Prevents propeller theft with a unique locking mechanism, providing boat owners peace of mind while safeguarding valuable equipment.
Product Details
- Provides excellent protection against propeller theft
- Free-spinning collar offers 24-hour protection during use, storage, and transit
- Crafted from naval brass and hardened stainless steel for maximum security
- Compatible with various stern drives and outboard motors
- Includes 1 lock, 1 key, 1 washer, and 1 cap
- Manufactured by McGard, a trusted brand known for high-quality security products
| Brand Name | McGard |
| Recommended Uses For Product | Security |
| Number of Pieces | 1, 2 |
| Included Components | 1 Plastic Cap, 1 Propeller Lock, 1 Propeller Lock Key, 1 Washer |
| Model Number | 74039 |
| UPC | 083509740394 |
| Model Name | 74039 |
| Global Trade Identification Number | 00083509740394 |
| Manufacturer | McGard |
| Unit Count | 1 Count |
| Item Type Name | Marine Propeller Lock |
| Manufacturer Part Number | 74039 |
| Additional Features | 24 Hour Protection, Free-Spinning Collar |
| Lock Type | Key Lock |
| Controller Type | Hand Control |
| Control Method | Touch |
| Style Name | Classic |
| Color | Black |
| Shape | Round |
| Material Type | Brass, Stainless Steel |
| Finish Types | Polished |
| Item Dimensions | 6.9 x 5.8 x 1.4 inches (17.5 x 14.7 x 3.6 cm) |
| Item Weight | 8.8 ounces (249.48 grams) |
| Part Interchange Info | 74039 |
| Brand | McGard |
| Special Feature | 24 Hour Protection, Free-Spinning Collar |
| Item dimensions L x W x H | 6.9 x 5.8 x 1.4 inches (17.5 x 14.7 x 3.6 cm) |
| Material | Brass, Stainless Steel |
What's in the box
1 Propeller Lock
1 Propeller Lock Key
1 Washer
1 Plastic Cap
Who Should Buy?
-
Boat Owners
Ideal for boat owners looking to secure their propeller from theft while docked or during transport.
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Marina Operators
Useful for marina operators wanting to encourage safe practices by providing propeller security solutions for customers.
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Frequent Travelers
Beneficial for those who frequently travel with their boats and need reliable theft protection for propellers.
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Casual Users
Not necessary for casual boat users who rarely leave their vessel unattended for longer periods.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the purpose of the MCGARD 74039 Marine Propeller Lock Set?
Answer: The MCGARD 74039 Marine Propeller Lock Set is designed to prevent theft of your propeller while ensuring secure attachment during operation. Utilizing a unique and precise key design, this lock set provides an effective barrier against unauthorized removal. It's particularly useful for boat owners who frequently dock in public places or leave their vessels unattended, as it deters opportunistic thefts. -
Question:
What are the specifications of the MCGARD 74039 Marine Propeller Lock Set?
Answer: The MCGARD 74039 Marine Propeller Lock Set features a thread size of 34-16, which is compatible with various Mercury, MerCruiser, and OMC applications. Its robust black construction not only adds aesthetic appeal but also resists corrosion, making it ideal for marine environments. This durability ensures that your propeller remains securely fastened without deteriorating under harsh conditions. -
Question:
How do I install the MCGARD 74039 Marine Propeller Lock Set?
Answer: Installation of the MCGARD 74039 Propeller Lock Set is straightforward. Begin by removing your current propeller mount. Then, simply thread the lock into place using the included key. It's crucial to follow the instructions provided for a secure fit, ensuring that the propeller is safely locked in position. This lock is typically utilized once you have your propeller in the desired position to prevent any accidental loosening during operation. -
Question:
Can I use the MCGARD 74039 lock on different boat brands?
Answer: Yes, the MCGARD 74039 lock is engineered to work with multiple boat brands, particularly those utilizing the Mercury, MerCruiser, and OMC systems. Its 34-16 thread size makes it versatile for a range of propeller types within compatible boats. This adaptability means it’s a practical solution for boat owners with diverse engines or those who may change their propeller setup. -
Question:
Is the MCGARD 74039 lock resistant to corrosion?
Answer: Absolutely, the MCGARD 74039 lock is designed with corrosion resistance in mind. Its black finish not only enhances its visual appeal but also protects against harsh marine elements such as saltwater and humid conditions. This characteristic ensures that it maintains its functionality and aesthetic over time, making it a reliable choice for regular marine use. -
Question:
Can the MCGARD 74039 Marine Propeller Lock be used for freshwater and saltwater boats?
Answer: Yes, the MCGARD 74039 marine propeller lock is suitable for both freshwater and saltwater boats. Its robust build and corrosion-resistant materials ensure that it withstands varying water conditions without compromising performance. Boat owners operating in either environment can confidently use this lock to secure their propellers against theft or loss. -
Question:
What tools do I need to install the MCGARD 74039 lock?
Answer: To install the MCGARD 74039 lock, you'll primarily need the included key and possibly an adjustable wrench for tightening purposes. It’s a simple tool-free setup for the majority of applications. This means you can easily secure your propeller without the need for specialized equipment, making it accessible for virtually all boat owners. -
Question:
How does the keying system of the MCGARD 74039 lock improve security?
Answer: The MCGARD 74039 uses a unique keying system that enhances security by preventing unauthorized access. Each lock features a distinct configuration, making it highly resistant to common theft techniques like universal keying or tampering. This state-of-the-art design assures users that their propellers are secure, especially during long docking periods or when left unattended. -
Question:
Where can I buy the MCGARD 74039 Marine Propeller Lock Set in The Bahamas?
Answer: You can find the MCGARD 74039 Marine Propeller Lock Set exclusively at Ubuy in The Bahamas. Their extensive selection ensures you will find this specific propeller lock, along with other marine accessories that enhance your boating experience. Ubuy provides a straightforward purchasing process, making it easy for you to secure your propeller swiftly. -
Question:
What maintenance is required for the MCGARD 74039 lock?
Answer: Maintaining the MCGARD 74039 lock is minimal. Regularly inspect the lock for any signs of corrosion or wear, particularly after use in saline environments. If necessary, use a lubricant to keep the keyhole functional. This simple upkeep extends the lifespan of your lock, ensuring it operates smoothly and effectively protects your propeller.
McGard Wheel Locks 74039 Editorial Review
The McGard 74039 Marine Propeller Lock Set is designed to provide enhanced security for your boat's propeller. With a 34-16 thread size, this lock set is specifically made for Mercury, MerCruiser, and OMC motors. It is made of high-quality materials and is easy to install. Customers have reported positive experiences with this propeller lock set. One customer mentioned that they had it installed on their 225 Evinrude motor and found it to be very secure. Another customer stated that they used it on their 225 hp motor without any issues. The installation process is straightforward, and the lock is tightened to the specified torque to ensure a tight fit. Customers have praised the peace of mind that this lock provides, especially in areas prone to prop theft. They appreciate the added protection it offers to their valuable propeller. However, one reviewer did mention a drop in engine performance after the installation. They suspected that the lock had loosened while operating the boat and had to retorque it. It's important to follow the manufacturer's instructions and regularly check the lock's torque to prevent any issues. Overall, the McGard 74039 Marine Propeller Lock Set receives positive feedback from customers for its ease of installation, quality materials, and enhanced security.
Customer Reviews & Ratings
279 customers ratings
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Pros
- High-quality materials
- Easy to install
- Provides peace of mind and added protection against prop theft
Cons
- Possible risk of loosening and drop in engine performance if not properly torqued
Platform Trust & Buyer Confidence
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Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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22 July 2026 · via Trustpilot
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23 July 2026 · via Trustpilot
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Features & Benefits
- 24-hour protection against propeller theft
- Free-spinning collar turns when attacked
- Constructed with naval brass and hardened steel for maximum security
- Fits multiple stern drives and outboard motors
- Contains globally sourced materials/components
- Overall lock length is 1.025 inches with a 3/4 inch-16 thread size and 1-1/16 inch hex size
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