| 摘要 |
An internal combustion engine mounted on a small planing watercraft 1 having a deck frame 40, a riders' seat 4 mounted removably on the frame 40, a propelling means, an internal combustion engine 20 for driving the propelling means through a coupling 46. The engine 20 includes, an oil receptacle 32 located at the bottom of the engine body and communicating with internal space of a crankcase, an oil tank 30 separated from the engine body is inserted from above through the opening of the deck frame 40 and removably fixed to the deck frame at a position away from the space above the coupling 46 which interconnects the engine and the propelling means. An engine oil collected in the oil receptacle 32 is transported to the oil tank 30 by means of a scavenging pump, and the oil in the oil tank 30 is supplied to various parts in the engine body by means of a feed pump.
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