Zinc and Aluminum Propeller Shaft Anodes
These propeller shaft anodes are designed by divers with installation in mind. Simply split the anode into the two halves, and then screw them together again around the shaft. This allows for installation without removing the propeller from the shaft. Don’t forget to push the anode up against the propeller, and leave between a quarter and half an inch between the shaft anode and the bearing.
Typically we recommend zinc for saltwater and aluminum for fresh or brackish water.