| 摘要 |
There is provided a liquid-cooled, vertical shaft type combustion engine which is compact in size and inexpensive in cost and which is provided with a duct capable of effectively utilizing a stream of cooling air induced by a cooling fan to cool various parts of the combustion engine with a high cooling performance. The liquid-cooled, vertical shaft type combustion engine includes an engine body (E), a crankshaft ( 2 ) accommodated in the engine body (E) so as to extend in a vertical direction, at least one engine cylinder head ( 31 ) disposed at a front portion of the engine body (E), a radiator ( 4 ) mounted above the engine body (E) for circulating an engine coolant, a duct ( 5 ) positioned below the radiator ( 4 ), and a cooling fan ( 6 ) operatively accommodated within the duct ( 5 ). The duct ( 5 ) has at least a front discharge opening ( 51 ) and side discharge ports ( 52 ) defined in a peripheral wall for discharging a stream of cooling air, induced by the cooling fan ( 6 ), in a direction forwardly of the engine body (E) and in a direction slantwise forwardly of the engine body (E), respectively.
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