Martyr Anodes CMPNDAF14UNS Aluminum Prop Nut Anode for Mercruiser Bravo III

The Martyr Anodes CMPNDAF14UNS (Martyr part number 865182C) is an aluminum prop nut anode designed to provide enhanced corrosion protection for Mercruiser Bravo III stern drives manufactured up to 2003. This sacrificial anode installs directly onto the propeller shaft, protecting expensive drive components from galvanic corrosion.

Key Features:

• Aluminum alloy construction optimized for saltwater and brackish water environments
• Direct replacement prop nut anode for Mercruiser Bravo III drives (up to 2003 models)
• Enhanced protection formula helps extend the life of stern drive components
• Threads directly onto propeller shaft for easy installation
• Sacrificial anode design corrodes preferentially to protect more valuable metal parts

Important Installation Note: Always verify adequate propeller clearance after installing this or any prop shaft anode to ensure safe operation and prevent contact with the hull or drive housing.

Material Selection Guide: Aluminum anodes are recommended for saltwater and brackish water use. For freshwater applications, magnesium anodes should be used instead. Traditional zinc anodes are also available for saltwater environments.