Genuine Mariner anodes are fitted from new and made to exacting standards to withstand the harsh saltwater environment in which Mariner outboards operate. Always use genuine anodes as the correct part is vital to protect your outboard from corrosion. Some websites claim that their non-OEM parts meet or exceed the quality of a genuine Quicksilver part. They are often inferior and in some cases can cost owners thousands to replace corroded parts due to the incorrect anode being fitted.
For Mercury Mariner 4, 5, 6HP 4-Stroke outboards. Also used as a cylinder block anode on Mercury/ Mariner 25hp and 30hp EFI models.