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View Full Version : Stihl fs 85 runs great but smokes a lot. Why


HenryB
09-27-2009, 02:37 PM
Title says it all. Same mix in my other 2 cycles so why does this unit smoke so much? Otherwise runs great.

HenryB
09-27-2009, 07:32 PM
Could it be too much oil in the mix. Other 2 cycles are not smoking:confused:

carriedrewdog
09-27-2009, 08:29 PM
Carburetor rich?

Alan0354
09-28-2009, 03:07 AM
Dirty air filter? I usually put too much oil, no smoking problem ever.

dutch1
09-29-2009, 10:54 PM
As mentioned before, high speed needle may be set to rich or you may also have a spark arrestor that has carbon buildup on the screen. If you have any oily residue around the spark arrestor/muffler port that is usually a signal that the spark arrestor is starting to be restricted.

Dutch