The Eco-Drive is a surface drive for all types of planing power boats. The drive has been developed and tested over several years and has its origins in the weaknesses other surface drives have always had. Compared to other drives or propeller arrangements, the use of surface drives results in higher speed and a better fuel economy. The investment in Eco-Drive will have repaid itself within a few years taking into consideration the higher cost for fuel, service/maintenance, larger repairs, and a potential complete breakdown, associated with other propulsion systems. The Eco-Drive does not have any components which require regular maintenance such as hydraulics, rubber hoses and bellows, universal joint assemblies or similar. This results in significant savings for the owner as there are no annual costs for spare parts or service. The Eco-Drive has no rudder fins or similar items which disturb the propeller stream and it can therefore achieve higher top speeds compared to other types of drives. The unique design means that reversing and manoeuvring at low speeds also works better than with any other surface drive. The advantages of surface drives is a well known fact amongst professionals in the boating industry and the use of such drives increase every year.