Mercury MerCruiser Propeller Nut 8M0105210

Mercury / MerCruiser Quicksilver Propeller Nut 8M0105210

The Mercury Quicksilver 8M0105210 Propeller Nut is a genuine OEM propeller retaining nut used on select MerCruiser Bravo sterndrive systems. It secures the propeller assembly to the propeller shaft, ensuring the propeller remains firmly attached during operation.

Key Specifications

• Part Number: 8M0105210

• Component Type: Propeller retaining nut

• Socket Size: 2-3/4 in prop wrench

• OEM Brand: Mercury Marine / Quicksilver

• Former Part Number: 11-859131

Compatible Drives / Applications

Commonly used on MerCruiser Bravo sterndrives, including:

• Bravo One

• Bravo Two

• Bravo Three

• Bravo Four S

• Zeus pod drives (front prop application)

On Bravo III drives, this nut typically secures the forward (inner) propeller, which is installed first on the prop shaft.

Function

The propeller nut threads onto the propeller shaft to lock the propeller in place. Proper installation helps ensure:

• Secure propeller retention

• Proper propeller alignment

• Reliable power transfer from the drive to the propeller

Using the correct OEM nut helps maintain proper torque and prevents loosening during operation.

Service Notes

A worn or damaged propeller nut may cause:

• Loose or vibrating propeller

• Difficulty maintaining proper propeller torque

• Increased risk of propeller damage or loss

Always inspect prop hardware during propeller service or replacement.

Fitment Tip:
Always verify compatibility using the sterndrive model and serial number. Propeller hardware varies between Bravo drive models and propeller configurations.

OEM parts ship same or next day for fast Canada wide shipping.

Technical Specifications:

• Type: Propeller nut
• Compatible with: Mercury MerCruiser sterndrive systems
• Part Number: 8M0105210