Armstrong, Nikaido, Marmelstein & Kubovcik
General-purpose internal combustion engine with vertical crank shaft
 A general-purpose internal combustion engine has a vertically extending crank shaft. The engine includes intake and exhaust valves disposed in overhead relationship to a cylinder head having an intake passage connected to the intake valve and an exhaust passage connected to the exhaust valve, the intake and exhaust passages being defined in opposite sides of the cylinder head. A carburetor and an air cleaner are coupled to the intake passage and located on the same side as the intake passage, and a muffler is connected to the exhaust passage and located on the same side as the exhaust passage. With this arangement, the engine has as small a height as possible. 
Honda Giken Kogyo Kabushiki Kaisha
F F Y F F F F F
F02B F02B Y10S F02F F02B F02B F02B F02B
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Shoji Yonekazu
Watanabe Uetsuji