I am thinking about buying a Minn Kota electric trolling motor, model Turbo Pro42. Has a foot pedal control. Cable steering. Question, When I step on the pedal (with no electric hooked up yet) the power head turns right and left. The upper part of the shaft turns with it, but NOT the lower half of the shift nor the prop housing itself turns with the powerhead. Is there a shear pin or something connecting the upper half and lower half of the shaft?