MIO is an Iranian company that offers a wide range of surface drive systems. It has developed a new model that has a drive shaft which can be trimmed up and down. This is known as Trimmable Surface Drive System. This capability allows the propeller to be trimmed for maximum performance whilst a spade rudder installed immediately behind the propeller is used for steering. The vertical adjustment for trimming the shaft is done by a hydraulic piston attached to the shaft support. The propeller shaft is vertically adjustable up to a maximum of °10 in the vertical plane, this ability allows selection of the optimum thrust angle and boat trim for varying load and sea conditions. The initial model of the trimmable surface drive system is capable of absorbing up to 800 hp that makes it suitable for boats up to about 15 metres in length. All surface drives utilize long life components and corrosion resistant materials to provide long service intervals and virtually eliminate time for repairs. Advantages: ● Built entirely of AISI 316 stainless steel ● Built in suction duct for quick planning ●Drive shaft trim angle (2°-10°) for maximum efficiency and high performance ●Compact Design (combination of trim cylinder and shaft bracket) ●Simple design, easy installation and servicing