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Black Oily Stuff

PostPosted: Tue Feb 21, 2023 8:25 am
by Bobf
Hi All

My Series 3 Li RT195 has recently been rebuild. The engine starts and runs Ok but I have noticed back stuff dripping from the exhaust pipe. It is thin watery liquid. Not too sure but could be a petrol mixture.

Any ideas? I do know that the petrol oil ratio was extremely high when received as the builder deliberately increased the oil content during the rebuild.

Rob

Re: Black Oily Stuff

PostPosted: Tue Feb 21, 2023 10:33 am
by hullygully
plug must be the same too?

Re: Black Oily Stuff

PostPosted: Tue Feb 21, 2023 4:53 pm
by Bobf
No the plug is extremely clean, in fact looks brand-new! I must add that I have not run the engine up to temperature yet as was concerned about the Black Stuff.

Re: Black Oily Stuff

PostPosted: Wed Feb 22, 2023 12:31 pm
by coaster
drop the oil ration to 3% and take it on some long runs, the black stuff will be unburn 2 stroke oil.

Re: Black Oily Stuff

PostPosted: Wed Feb 22, 2023 2:44 pm
by Bobf
Thanks for the advice. Will do as you suggest.

Will feedback.

Rob

Re: Black Oily Stuff

PostPosted: Wed Feb 22, 2023 6:31 pm
by Storkfoot
Bobf wrote:…. I have noticed black stuff dripping from the exhaust pipe. It is thin watery liquid. Not too sure but could be a petrol mixture


Just to clarify. Is the black stuff dripping from the tailpipe of the exhaust, or is it coming from, say, the exhaust manifold?

Re: Black Oily Stuff

PostPosted: Wed Feb 22, 2023 7:45 pm
by Bobf
Yes from the tailpipe end

Rob

Re: Black Oily Stuff

PostPosted: Wed Feb 22, 2023 8:23 pm
by Storkfoot
In which case, as Coaster says, go for a long run and get the engine hot :)