Two part double dipped conformal acrylic coating on all electronic boards and components. Special low-copper, low-corrosion alloy in all cast-metal components. Every fastener and control cable is made of corrosion-proof stainless steel (Foot operated models). All fasteners are stainless steel, any in "wet" locations are coated to further protect from galvanic corrosion. Anodized aluminum mount components remove the threat of galvanic corrosion. Sacrificial anode. Ivadized lower unit for maximum protection. HyperDrive™ Lower unit with built-in weed ring, extended skeg, and three blade Machete® prop for quiet, weed-free performance.