Engine Trouble weed eater 25cc engine runs on choke

Discussion in '2-Stroke Engines' started by PickerBenny, Jun 26, 2015.

  1. PickerBenny

    PickerBenny New Member

    Hello just finished my first build. friction drive weed eater bike with a peg roller. only runs when I switch the carb between half and full choke. I have black residue exiting the muffler and on top of the sparkplug. too much oil? carb rebuild? thanks for the help in advance.
     

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  2. 2StrokeMama

    2StrokeMama Member

    That black residue will be your carbon build up. Had you done a carb clean before you tried to fire er up? I'll clean everything before I put it all back together and fire it up for the first time IN MY HANDS. Sounds like the mixture is running lean if it only runs with the choke. A carb clean will go a long way. I'd start there if I was you.... I'm sure others will chime in.
     
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