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Discussion Starter #1
It is a John Deere STX38 with a Kohler CV13 Engine. I can not get it to idle below 2200 rpm. I have adjusted the idle speed screw and idle mixture screw with no luck. I have also adjusted the governor (static) per the repair manual. There is some play in the throttle shaft but not that much IMO. The throttle shaft is resting against the idle screw as it should. I have had the carb off to check the throttle plate and it is there. I have even put an o'ring under the throttle shaft to make sure there was no air leak. I could really use some help on this one. I dont think a new carb will fix the problem -- do you folks ??
 

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It sounds to me as if the control cable has slipped. Back the idle speed screw out 3 or 4 turns and see if that helps. If not check the cable.
Dave
 

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Discussion Starter #3
Dave - thanks for the reply. I cable is fine. The throttle shaft is resting against the idle speed screw as it should. I have the idle speed screw backed all the way out.
 

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Sounds like a vaccuum leak, but from another area maybe? Get it running and spray some carb cleaner around the vaccuum hose from the engine,vent I believe. The head gasket may also be issue. Sorry I can't help more, maybe a video for the others might help?
 

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Discussion Starter #5
Problem Solved - Looked through the carb and saw light coming through. The butterfly was not sealing due to the top piece of the shaft being able to move around the shaft. I tried to peen it over but it didnt hold. I used red loctite to glue the top piece to the shaft and reset the butterfly and screws. Seems to be working fine. I used blue loctite on the butterfly screws. I hope they hold
 

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Great! Glad you got it!!!
God bless!
Eric
 
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