Bracket unit
2-16
Operation
When power is supplied to the steering motor inside the steering actuator “1”, the pipe integrated with
the motor turns. The rotational speed of the pipe is reduced as it is transmitted through the planetary
gears to the shaft in the center of the pipe. Because both ends of the shaft are secured to the swivel
bracket, the steering actuator moves 2 mm (0.08 in), which is the internal thread pitch distance, in a
straight line in the shaft direction for each turn of the pipe. The movement direction of the actuator
changes according to the turning direction of the motor. When the steering actuator moves toward the
starboard side, the outboard motor is steered to the port side and when the steering actuator moves
toward the port side, the outboard motor is steered to the starboard side. Because the rear of the ac-
tuator is connected to the steering arm “2”, the linear movement of the actuator is converted into turn-
ing movement (with the steering arm shaft as the axis) in order to steer the outboard motor.
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