Suzuki - Gear Case Anode - See Description for Engine Models - 55321-90J01 Gear case anodes are essential for protecting your Suzuki outboard motor parts from galvanic corrosion in freshwater environments. Be sure to replace gear case anodes regularly to prolong the life of your Suzuki 4-stroke outboard. This Suzuki gear case anode fits the following Suzuki 4-stoke outboard models: DF 60 DF 70 DF 90 DF 115 DF 140