a preferred embodiment of the trolling motor device 10 according to the present invention is shown in fig1 - 4 . the trolling motor device 10 includes a mounting unit 12 connected to a drive unit 14 by a pivotable connection 16 . the mounting unit 12 includes a mounting plate 12 a having a pair of inwardly extending flanges 12 b to be secured by fasteners 18 ( e . g . stainless or brass screws ) to an upper surface of the deck 20 of the boat 22 . the drive unit 14 includes an upper steering unit 24 connected to an upper end of drive unit housing 26 , and a lower drive unit 28 connected to a lower end of the drive unit housing 26 . the upper steering unit 24 includes a rack and pinion arrangement for mechanically rotating the drive unit housing 26 for steering the boat 22 . the lower drive unit 28 is fitted with a propeller 30 , and includes an electric drive motor ( e . g . 12 volt , 24 volt , 36 volt dc electric motor ) for rotating or driving the propeller 30 . the trolling motor device 10 includes a boat battery 32 electrically connected to a foot pedal control unit 34 . the foot pedal control unit 34 is electrically connected to the drive unit 14 , in particular the upper power steering unit 24 , by control cable 36 . the foot pedal control unit 34 is configured to control the on / off , speed and polarity ( i . e . forward or reverse ) of the lower drive unit 28 , and for also controlling the upper steering unit 24 for steering the boat 22 . the detail construction of the trolling motor device 10 according to the present invention is shown if fig3 and 4 . the upper end of the upper drive unit housing 26 a includes an extension 27 accommodating a gear 42 ( fig3 ). the control cable 36 includes a mechanical cable 44 having an end fitted with a rack 46 providing a rack and pinion arrangement with gear 42 . the foot pedal control unit 34 moves the mechanical cable back and forth , and in turn moves the rack 46 back and forth acting on the gear 42 to rotate the upper drive unit housing 26 a for steering the drive unit 14 by use of the foot pedal control unit 34 . the control cable 36 contains electrical wires 48 a , 48 b , 48 c , extending between the foot pedal control unit 34 and the upper steering unit 24 . the electrical wires 48 a , 48 b , 48 c are contained within a drive unit power cable 50 , which extends from the upper steering unit 24 through the drive unit housing 26 to the lower drive unit 28 . the drive unit power cable 50 is preferably coiled to be extendable and retractable to change length to accommodate the change of length of the drive unit housing 26 ( i . e . lower drive unit housing 26 b retracting into upper drive unit housing 26 a ). as shown in fig1 , the upper drive unit housing 26 a is provided with a sealing plate 52 , elastrometric seal 54 and cable fastener 56 for sealing and anchoring the upper end of the drive unit power cable 50 within the drive unit housing 26 . the lower drive unit housing 26 b is provided with a sealing plate 58 , elastrometric seal 60 and a cable fastener 62 for sealing and anchoring a lower end of the drive unit power cable 50 within the lower drive unit housing 26 b . the sealing plate 58 is located so as to provide a cavity 64 for accommodating the drive unit power cable 50 when the lower drive unit housing 26 b is fully retracted into the upper drive unit housing 26 a . the lower drive unit housing 26 b can be extended / retracted or otherwise telescoped from the upper drive unit housing 26 a by manually or powered actuation . a variety of examples for telescoping the lower drive unit housing 26 b in and out of the upper drive unit housing 26 a are shown in fig5 - 10 . in the embodiment shown in fig5 , the drive unit housing 126 is hydraulic actuated to drive the lower drive unit housing 126 b into and out of the upper drive unit housing 126 a . a hydraulic pump 170 is supplied with hydraulic fluid from reservoir 172 : a hydraulic control unit 174 is connected between supply / return lines 176 , 178 for controlling the upward and downward movement of the lower drive unit housing 126 b in and out of the upper drive unit housing 126 a . in the embodiments shown in fig6 , the drive unit housing 226 is pneumatically actuated . an air compressor 280 is connected to pneumatic control unit 282 by a high pressure line 284 . the pneumatic control unit 282 is connected to the drive unit housing 226 by supply / return lines 286 , 288 . in the embodiment shown in fig7 , the drive unit housing 326 is actuated by a separate powered actuator 390 . the powered actuator 390 can be a hydraulic actuator , a pneumatic actuator , an electric actuator , or electromagnetic actuator . further , the powered actuator 390 is shown disposed within the drive unit housing 326 , however , alternatively the actuator 390 can be located outside or as a part of the drive unit housing 326 itself . in the embodiment shown in fig8 , the upper drive unit housing 426 a is provided with a pinion 492 cooperating with a rack 494 provided on the lower drive unit housing 426 b . the pinion 492 can be manually actuated or powered actuated directly or remotely . in the embodiment shown in fig9 , the upper drive unit housing 526 a is provided with a worm gear drive 596 and the lower drive unit housing 526 b is provided with a rack 598 . the worm gear drive 596 can be manually or power actuated directly or remotely . in the embodiment shown in fig1 , a cable 671 is connected at its lower end to the lower drive unit housing 626 b , and extends upwardly through the upper drive unit housing 626 a . an upper end of the cable 671 is provided with a handle 673 to raise and lower the lower drive unit housing 626 b within the upper drive unit housing 626 a .