| 摘要 |
To provide an internal combustion engine of a vertical shaft type, in which leakage of an oil from a crankcase and an oil pan is effectively prevented, which has high mounting rigidity relative to a working machine and, also, which is capable of being easily serviced, the combustion engine includes a vertically extending crankshaft ( 9 ) having a pair of upper and lower crank webs ( 14 A and 14 B), a crankcase ( 1 ) accommodating the crankshaft ( 9 ) and including an oil pan ( 2 ), and a crankcase cover ( 3 ) mounted on an upper surface ( 1 a) of the crankcase ( 1 ) to cover the crankcase ( 1 ). The upper surface ( 1 a) of the crankcase ( 1 ) is positioned above the upper crank web ( 14 A).
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