26HP Kohler Blows Black Smoke and Runs Like Crap

[jgray1978]

This may be a dumb question but could running unleaded with up to 10% ethanol be the problem? I figured not due to how new this is and ethanol enriched fuel seems to be everywhere.

 

[sjessen]

Almost sounds like there is apart to the carb that is missing. A friend of mine has a kawi that did that and it turned out to be a missing spring that was to keep the butterfly on the carb open.