Old Engines in Japan 1940s YANMAR Diesel Engine Type S4 4hp [modified]

Originally, this engine was diesel engine, but it was modified to spark-ignition engine. A carburetor, spark plug and an ignition magneto were attached to it newly.
YANMAR Diesel Engine Type S4 [modified]
4hp/750rpm [before modified]
Around 1948
Manufacturer : YAMAOKA Internal Combustion Machines Co., LTD.
Manufacturer's Location : Chayamachi, Kita-ku, Osaka-shi, Osaka, Japan
This Engine is not my thing. I observed this engine at 2014 IZUMOZAKI engine show.
www.nicovideo.j...
[いにしえの発動機たち] 1948年頃? ヤンマーヂーゼル機関 S4形 (魔改造)
2014年出雲崎発動機運転会で見学させていただきました。

[@luisantoniomarrega3713]

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