Being new to 4 stroke engines and in fact just started my brand new one today, I have a couple of questions.

I ran the needle at 1.5 turns out it seemed to be running rich which is fine, I ran it at 4,000 RPM for the first tank of like 8oz did not time it let it run the whole tank.

Now the head temp seemed fine was not too hot, however the muffler was smoking, could not even touch it.

Is this normal or did I do something wrong?

(sorry if this has been discussed 100 times before I could not find a relevalant post)