Installing a rudder anode or trim tab anode will help prevent those parts from corroding.
Flat surfaces are most ideal for the installation of these anodes.
All Sea Shield zinc anodes conform to Mil Spec MIL-A-18001 for maximum protection.

Designed by divers, for divers
Captive stainless steel Allen Head fastener for easiest underwater installation - no slot for the driver to slip out of
Nut is encapsulated to prevent loss
Lock washers prevent loosening under vibration
Made in California, USA