Hi Xoie, neat looking machine you have there. But l have a friendly advice. The woodgas you flared and run the engine with looks full of tar. First, the white smoky woodgas is not water vapour (althugh water can be a cause for this!) but is actualy smoke (tar). Second, the flame colour. A healthy flame colour is wery hard to describe but a true woodgaser recognizes it right away. Its cler, blue-violete-orange in colour.
Its not my intention to “salt your wisdom” as we like to say here, its just l have destroyed a engine before runing eaven cleaner gas thain this and wuldnt like anyone to repeat my mistakes.