Description
Sierra 18-3701 Mercury 75HP+ Prop Nut Kit is a premium aftermarket marine hardware kit designed to securely fasten and retain propellers. It is engineered to meet or exceed original equipment manufacturer (OEM) standards, offering a corrosion-resistant design suitable for both freshwater and saltwater environments.
Compatibility
The kit features broad compatibility across high-horsepower outboards and popular sterndrive systems:
- Outboards: Fits Mercury and Mariner 75 HP and higher engines.
- Exclusions: Does not fit the 225 EFI 4-Stroke model.
- Sterndrives: Fits MerCruiser Alpha One and Bravo drives.
- Other Brands: Also replaces corresponding hardware on select Chrysler, Force, US Marine, and Honda applications.
Kit Contents & OEM Cross-References
This kit comes as a drop-in replacement with no modifications required:
Included Components: Prop Nut, Tab Washers / Lock Washers, and Prop Spacer.
Replaces OEM Part Numbers:
- Mercury/MerCruiser
- 11-52707A1
- 11-52707A2
- 11-52707Q1
Also replaces Mallory 973960 and GLM 21250.
