| 摘要 |
In a tilt device for a marine propulsion unit, a cylinder is constituted by a double pipe having an outer cylinder and an inner cylinder, a rod guide sealing the outer cylinder and the inner cylinder is provided at an end portion of the cylinder, a free piston is arranged in a space between the outer cylinder and the inner cylinder, a liquid discharging chamber is formed in a rod guide side from the free piston of the space, and an absorber valve which can be opened at a time when a pressure of a fluid in the rod side chamber is increased to a level equal to or more than a predetermined value and can feed the fluid in the rod side chamber to the liquid discharging chamber and a return valve which can feed the fluid in the liquid discharging chamber to the rod side chamber are provided in the rod guide.
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