Brunswick Corporation
Multi-speed transmissions for marine propulsion devices

Abstract:

A transmission for an outboard motor, the transmission having an input shaft with an input gear non-rotatably fixed thereto and rotatable by an engine. A countershaft has a countershaft driven gear and a reverse driving gear non-rotatably fixed thereto, where the countershaft driven gear meshes with the input gear. An output shaft has first and second driven gears non-rotatably fixed thereto. First and second driving gears mesh with the first and second driven gears, a reverse idler gear meshes with the reverse driving gear, and a reverse driven gear meshes with the reverse idler gear. First and second clutches selectively rotate the first and second driving gears with the countershaft in first and second modes at first and second speeds in forward rotation, respectively, and a reverse clutch selectively rotates the output shaft with the reverse driven gear in a reverse mode with reverse rotation.