Patent ID: 8337354
Filing Date: 2012-12-25
Classification: B63H

Abstract:
1. A marine propulsion unit comprising: a case arranged to be supported by a hull; a propeller shaft supported in a lower portion of the case; a transmission housed in the case and arranged to receive an engine output, to change a speed of the output, and to transmit the output; a transfer device arranged to transfer the output of the transmission to the propeller shaft; a clutch rotating body including a wet-type multiplate clutch arranged in the transmission and rotatable about an axis extending in a vertical direction; a plurality of clutch plates on the clutch rotating body and arranged to move in an axial direction so as to be engaged with and disengaged from each other by movement in the axial direction; an oil reservoir arranged in a bottom portion of the clutch rotating body and arranged to receive lubricating oil; a peripheral wall arranged radially outside the oil reservoir and fit to each of the clutch plates; and a communicating hole arranged in the peripheral wall of the clutch rotating body to communicate the oil reservoir with an outside of the clutch rotating body in the radial direction.