Kohler CH20S not operating correct

   / Kohler CH20S not operating correct #11  
Take that thing and run it at night or in the dark and see if the exhaust pipe is glowing red, indicating a lean condition and a partially clogged jet. I think you have a carb problem and I would bve interested in knowing any circumstances leading up to this malfunction. Has this machine been sitting all winter?
 
   / Kohler CH20S not operating correct #12  
Another thing to try and look for is get some spray carb cleaner and hose off all of the governor linkage and throttle linkage. If you can get it running long enough spray the carb cleaner around the carb to head intake gasket to see if it affects how it runs at all. All of the heat can cause gaps between the intake and carb. And all of the other checks of gas tank filters and internal carb filters. Like others said was check your plug color. Does it run better with the air filter off?
 

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