The stern thrust installation, developed and produced by ALMAR, is being mounted underneath the bathing plattform at least 80 mm below the water-line on the outside onto the flat of the stern. The mounting is very easy as only a drilling on the hull of 60 mm in diameter is necessary in order to guarantee the power supply. For mounting, 4 screws are provided on both ends. In the driving range the aggregate itself is encapsulated completely waterproof. The complete unit is plastic-laminated and after the installation coated with antifouling. The propeller shaft is sealed twice by special shaft seals. Caused by the special construction of the water in- and outlet area a high efficiency is achieved.