Retaining Nut for MerCruiser R-MR Alpha I Gen II - 816811-2, 8168111, 18-3752

Retaining Nut for MerCruiser

This retaining nut is an OEM replacement for MerCruiser R-MR Alpha I Gen II stern drives, with cross-reference numbers 816811-2, 8168111, and 18-3752.

Overview

This retaining nut is designed for MerCruiser R-MR Alpha I Gen II outdrives, serving as a direct replacement for part numbers 816811-2, 8168111, and 18-3752. It secures the propeller or other components onto the drive shaft, ensuring reliable performance. The retaining nut is a critical component for maintaining proper operation of your MerCruiser drive system.

Built For Performance

• Precision threaded to match MerCruiser R-MR Alpha I Gen II shafts
• Manufactured from corrosion-resistant steel for marine environments
• Direct replacement for OEM part numbers 816811-2, 8168111, 18-3752
• Ensures secure retention of drive components
• Easy installation with standard tools

Fits These Machines

• for MerCruiser R-MR Alpha I Gen II

On-The-Job Use

• Secures the propeller on MerCruiser R-MR Alpha I Gen II drives
• Used during routine maintenance or replacement of drive components
• Essential for restoring factory torque specifications
• Commonly employed in marine repair shops and DIY boat owners

Specs At A Glance

Good To Know

Q: Is this retaining nut compatible with other MerCruiser models? A: This retaining nut is specifically designed for the R-MR Alpha I Gen II; other MerCruiser drives may use different thread sizes.

Q: What material is this retaining nut made from? A: It is constructed from marine-grade steel to resist corrosion and ensure long-lasting performance in saltwater or freshwater environments.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.