| 摘要 |
An outboard motor steering system for an outboard motor mounted on a stern of a boat and having an internal combustion engine and a propeller with a rudder powered by the engine to propel and steer the boat. The system includes a swivel shaft connected to the propeller, a swivel case rotatably accommodating the swivel shaft, and a hydraulic cylinder connected to the swivel shaft to rotate it. The swivel case is formed with a box-like recess to accommodate the hydraulic cylinder therein such that the hydraulic cylinder does not project outside a profile of the outboard motor, regardless of a steered angle of the outboard motor. A rotation angle sensor is also installed in the recess and outputs a signal indicative of an angle of swivel shaft rotation. Further, moving orifices are provided in a hydraulic pressure circuit of the actuator for relieving excessive hydraulic pressure. Thus, space utilization around the outboard motor and boat is not restricted and steering feel is improved.
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