hwellens & carbking:
Thank you very much for your prompt reply. Thats a great starting point. I'm trying to find an original carburetor. If not available, I will have to optimize either the existing one or find a replacement.
It's a flathead silver dome 6 cylinders inline engine.
I'm looking for information/history of the engine and a list/drawings of original components (carburetor...) and where I could buy original parts. Thank you for your help!