Precision bow thruster, version with 1-piece brass tube, gear version with bevel gears made of metal, gear housing made of brass with permanent grease filling, one 4-blade propeller made of cast brass with excellent efficiency, drive shaft with 2 sintered bearings, output shaft with 1 sintered bearing, 1 ball bearing and 1 rotary shaft seal, drive shaft and output shaft made of stainless steel.