| 摘要 |
Disclosed herein is a marine propulsion device comprising an engine including a bottom face with an exhaust gas passage port, together with a lower unit connected to the bottom face and including a side surface, and an exhaust gas passage communicating with the engine port and terminating in a port in the side surface, and an exhaust gas passage conduit connected to the lower unit in communication with the port in the side surface and extending upwardly therefrom to above the power head and thence downwardly. The engine includes a cooling jacket, and the lower unit has a substantially closed cavity including a gear box portion and a sleeve portion, together with a water jacket cavity surrounding the sleeve portion, and water inlet means communicating with the water jacket cavity. In addition, the lower unit includes a reversing transmission in the gear box portion of the substantially closed cavity and connecting a propeller shaft to a drive shaft extending in the sleeve portion of the substantially closed cavity, and a water pump supported within the lower unit and communicating with the engine cooling jacket and with the water jacket cavity for delivering water from the water jacket cavity to the engine cooling jacket. |
