Thanks for the reply
I'm premixing all the way. Are you talking about the 2stroke pump, because if you are, I did already took it of. I'm premixing about 25:1 at the moment. Think that's maby a reason.
It looks more like a petrol smoke to me than an oil smoke. May be wrong? What do you think?
Or it can be that the pipe is just SO dirty inside. Don't know