Method of inhibiting corrosion of a component of a marine vessel

A method for inhibiting corrosion of a component of a marine vessel when an electrical system of the marine vessel is connected in electrical communication with a source of electrical power which is external to said marine vessel, comprising the step of:

• providing a first circuit point which is connectable in electrical communication with a first point of said component, said component being a marine propulsion device;
• providing a second circuit point which is connectable in electrical communication with a second point of said source of electrical power which is external to said marine vessel, said first and second circuit points being connectable to a ground wire of a three wire electrical cable which is connected in electrical communication between a shore based source of electrical power and said electrical system of a marine vessel, said electrical system being connected in electrical communication with said marine propulsion device, wherein the floor of the body of water in which the marine vessel is operated acts as an anode and said marine propulsion device acts as a cathode;
• decreasing the voltage potential of said first point below the voltage potential of said second point by a preselected differential magnitude;
• ohmically connecting said first point to boat ground by said ground wire;
• ohmically connecting said second point to shore ground by said ground wire;
• ohmically connecting said component to said ground wire;
• impressing electronic current on said ground wire to induce electronic current flow in said ground wire in a direction of electron flow from shore ground to boat ground, said first and second points being ohmically bi-directionally connected to each other.

A method for inhibiting corrosion of a marine propulsion device of a marine vessel when an electrical system of the marine vessel is connected in electrical communication with a source of electrical power which is external to said marine vessel, comprising the step of:

• providing a first circuit point which is connectable in electrical communication with a first point of said marine propulsion device;
• providing a second circuit point which is connectable in electrical communication with a second point of said source of electrical power which is external to said marine vessel, said first and second circuit points being connectable to a ground wire of a three wire electrical cable which is connected in electrical communication between a shore based source of electrical power and an electrical system of a marine vessel, said electrical system being connected in electrical communication with said marine propulsion device, wherein the floor of the body of water in which the marine vessel is operated acts as an anode and said marine propulsion device acts as a cathode;
• decreasing the voltage potential of said first point below the voltage potential of said second point by a preselected differential magnitude;
• ohmically connecting said first point to boat ground by said ground wire;
• ohmically connecting said second point to shore ground by said ground wire;
• ohmically connecting said marine propulsion device to said ground wire;
• impressing an electronic current on said ground wire to induce electronic current flow in said ground wire in a direction of electron flow from shore ground to boat ground, said first and second points being ohmically bi-directionally connected to each other;
• measuring a voltage potential of a third point which is representative of said voltage potential proximate said first point, said voltage potential of said third point being measured relative to the voltage potential of said first point.