Yamaha - Trim Tab Skeg Anode Corrosion Protection Component 6E5-45371-01-00. Overview. The Yamaha Trim Tab Skeg Anode 6E5-45371-01-00 is one of those parts that quietly protects your lower unit every time you're in the water. In saltwater especially, corrosion is always working against your engine, and this anode takes that hit instead of your gearcase and skeg. When it starts wearing down, it's doing exactly what it's supposed to do. Keeping a fresh one on there is a simple way to protect your motor and avoid bigger problems later.. Key Features. • Sacrificial Corrosion Protection - Absorbs corrosive damage to protect lower unit components.. • OEM Fit Precision - Designed to match Yamaha trim tab mounting points for secure installation.. • Dual Function Design - Acts as both a trim tab and protective anode for the skeg.. • Saltwater-Ready Construction - Built to handle harsh marine environments and extended exposure.. Engine & Boat Compatibility. • F115 Present• VF115 Present• 115 Pre