This very powerful bow thruster is supplied fully mounted with a Blue RM-410 7.2-Volt electrical motor, 11 Amp. max. The propulsion is provided by a flat impeller (paddle) which pressurizes the water through jet nozzles whereby the entire assembly functions as a pump. This design is very robust and very stable and requires very little maintenance. The pump housing and the extension tubes are made of ABS (acrylonitrile butadiene styrene). The motor is sealed with a G-ring and an O-ring which prevents the entry of water whereby the bow thruster can be installed vertically as well as horizontally. The motor with the pump housing cover can be removed easily. The cover has an O-ring that ensures water-tight sealing of the entire assembly. For further technical information: See the dimensional drawing and the technical details of the motor. Blue RM-410 electrical motor. Max. RPM 17.000 – voltage without load: 0.5 Amps Highest performance: 78% – Motor shaft: 2.3 x 12 mm.