The photos at Jack Craibs site, http://www.caille.8m.com/rowboat/Koban/koban-index.html show the C with a different mixer than the others so there must have been at least two variations. The 1915 C poppet valve is horizontal while the other ones are vertical. The motor I’m working on is a ’21 H so if the dimensions are different than the ones given, I should be able to figure it out soon enough. Good point!
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