The Mercury OEM Nyloc Prop Nut & Tab Washer Kit (11-52707Q 1A) is a critical component for proper propeller retention and lower unit protection. Designed by Mercury for reliability and safety, this kit ensures your prop stays securely fastened under load, preventing costly damage and potential prop loss.
At Buckshot Racing #77, we supply genuine OEM Mercury hardware, ensuring correct fitment, material quality, and long-term performance across a wide range of outboards.
Why Proper Prop Nut Retention Matters
A properly secured propeller is essential for both performance and durability. If a prop nut becomes loose, it can allow the propeller to move or “hammer” back and forth on the shaft, leading to vibration and potential internal damage.
This repeated movement can place stress on the drivetrain and may result in gear wear, chipped gears, or even complete prop loss in extreme cases. Using a new OEM Mercury nyloc nut and tab washer system ensures the prop remains locked in place under all operating conditions.
OEM Nyloc Nut Design
The Mercury nyloc prop nut features an integrated nylon locking insert that creates resistance against the threads of the prop shaft. This locking action helps prevent the nut from backing off due to vibration, load changes, and high RPM operation.
Because the nylon insert deforms during installation, nyloc nuts are considered single-use components. Reusing an old nut reduces its locking ability and increases the risk of loosening during operation. For this reason, replacing the nut during service is strongly recommended.
Tab Washer Locking System
This kit includes two tabbed locking washers, which provide an additional mechanical locking method. After torquing the nut, one of the washer tabs is bent upward against a flat edge of the nut, physically preventing rotation.
This dual locking system—nylon insert plus tab washer—is the standard for Mercury propeller retention and is widely used across both recreational and high-performance applications.
Proper Installation and Torque Specification
For correct installation, the prop nut should be tightened to approximately 55 ft-lbs of torque, or until a flat surface of the nut aligns with a washer tab. Once aligned, a tab is bent upward to lock the nut in place.
Proper torque and tab engagement are essential to ensure the propeller remains secure and to prevent movement on the shaft.
Wide Fitment Across Mercury Outboards
The Mercury 11-52707Q 1A prop nut kit fits a wide range of Mercury Marine and Mercury Racing outboards, including many 2-stroke and 4-stroke models.
Common applications include Mercury 2.0L, 2.4L, 2.5L, and 3.0L V6 outboards, such as 135, 150, 175, 200, 225 Pro Max, 260 EFI, 280 ROS, and 300 HP models, along with many modern Mercury platforms.
Because this is a genuine OEM kit, it ensures proper fitment and compatibility across multiple prop shaft designs used by Mercury.
OEM Part Numbers and Kit Contents
11-52707A1, 11-52707Q1, and 11-827614
Each kit includes:
- One (1) OEM Mercury brass nyloc prop nut
- Two (2) OEM tabbed locking washers
Built for Reliability and Safety
From everyday boating to high-performance applications, keeping your propeller securely mounted is essential. The Mercury OEM Nyloc Prop Nut & Tab Washer Kit (11-52707Q 1A) provides the correct hardware to maintain proper retention and protect your lower unit.
At Buckshot Racing #77, we supply genuine Mercury OEM components to ensure your outboard performs safely and reliably—whether you're on the lake, offshore, or at full throttle.