Hi all,

Just wanted to know if this is as wrong as I think it is...started my new four stroke (YS110), and on the VERY FIRST RUN (needle settings as per instructions) it wouldn't run consistently, and the exhaust was black! I normally associate black exhaust with either i) too lean running, or ii) normal in break in process, after a couple of tanks - clears up again in this case.

Could it have been bad stuff left over from manufacturing in the combustion chamber?

Cheers,
Ken