Volvo Penta Zinc cavitation plate anode for a DP-R outdrive.
If your anode is worn away by 33% or more, it is advisable to change it, as more of its surface area has been worn away and the remaining anode will wear away much quicker. Please note this is a Zinc anode for saltwater use. The magnesium version is only suitable for freshwater and aluminium, which is suitable for brackish water.
Volvo Penta Part No: 3589875