Just a note on this subject, the amount of black sut coming out is not little dots I mean, it's really alot, from just running one tank, it could be related to the oil choice, since I dont have access to lawn boy ashless over here I decided to break in the engine using the zenoah oil, I might switch to arnold lawn mower oil and see if there is any difference in the amount that comes out.

Also spekaing of oils has anyone tried yamaha 2T oil, am looking for the mobile 2T but did not find anything so far close to it nor even the ones that are mentioned in the manual, can anyone just reply with the the oil contents they are using see if I can find a close match to it.