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Coleman go kart issues

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Rworthngton
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2023/05/13 16:36:48 (permalink)
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Coleman go kart issues

I have a Coleman kt196 (Honda clone motor) that I've had for a few years. It starts up just fine. However at idle the engine surges, sometimes to the point of engaging the drive. On top of this as soon as I touch the throttle it stalls. I've pulled the carb apart a few times and I'm sure it's clean and clear. I even tried a second carb I had and the same problems persist. Fuel supply is also fine. I am at a loss as to what else I could be missing. Any ideas would be greatly appreciated.
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    SRTsFZ6
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    Re: Coleman go kart issues 2023/05/13 19:02:36 (permalink)
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    Surging is usually fuel related.  
     
    Does your carb have a small black part (maybe 5/16" across) that's held in from/by the idle set screw?
    The idle adjustment screw has to be removed to get to this part that simply pulls up and out.
     
    If so, there's a very, very small jet (idle) in there that is easily clogged.
     
    I believe there's a very, very small o-ring on the end of that that if broke, will al so cause idle issues...
     
    .
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    Rworthngton
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    Re: Coleman go kart issues 2023/05/13 20:00:01 (permalink)
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    I cleaned the idle jet as well and it made no difference. I have seen suggestions to bore the idle jet out a little bit but did not go that far.
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    SRTsFZ6
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    Re: Coleman go kart issues 2023/05/14 08:07:28 (permalink)
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    So you have NOT opened up that jet?
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    Rworthngton
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    Re: Coleman go kart issues 2023/05/14 14:23:56 (permalink)
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    It is still the stock opening. Not sure what size it is currently. However it is the same one that worked before this year.
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    SRTsFZ6
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    Re: Coleman go kart issues 2023/05/14 16:15:29 (permalink)
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    Many small engines, over time, need the mix richened up as the EPA has them set extremely lean from the factory for emission purposes.
     
    You may consider opening it up.  
     
    .
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    Rworthngton
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    Re: Coleman go kart issues 2023/05/14 18:23:10 (permalink)
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    This should help with the surging but I don't think that will help with it stalling as soon as apply any throttle at all
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