| 摘要 |
An outboard motor, which is improved for higher output energy, lower fuel consumption, and also simplified in layout of oil paths and facilitating maintenance of hydraulic control valves, includes an engine with a crank shaft, an engine body mounted to a mount case, and a valve driving mechanism for opening and closing intake valves and exhaust valves. The valve driving mechanism includes a valve operating characteristics variable mechanism of an hydraulic type, which changes operating characteristics of the intake and/or exhaust valves in accordance with the revolution speed of the engine. A hydraulic oil path for supplying the valve operating characteristics variable mechanism with hydraulic oil branches from a lubricant oil path for supplying bearing portions of a crank shaft and the valve driving mechanism with lubricant oil.
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