Patent ID: 7704183
Filing Date: 2010-04-27
Classification: B63H,F16H

Abstract:
1. An outboard motor comprising: a drive shaft including a pinion gear arranged at one end of the drive shaft; a first driven gear engaged with the pinion gear; a second driven gear engaged with the pinion gear; a first propeller shaft connected to a second propeller; and a second propeller shaft connected to a first propeller; wherein the first driven gear is engaged with the pinion gear and with the second propeller shaft during each of forward, neutral, and reverse modes of the outboard motor, and the second driven gear is engaged with the pinion gear and with the first propeller shaft during each of the forward, neutral, and reverse modes of the outboard motor; the first propeller and the second propeller rotate in directions opposite to each other during the forward mode and during the reverse mode; the outboard motor further includes: the transmission ratio changing unit and the shift switching unit are housed in a rower transmission mechanism.