Kohler Ch20S

[dropzone]

I have a hesitation off idle, in other words when I hit the gas the motor stumbles then picks up. Normally I would adjust the mixture screws and it would fix the problem but I do not for the life of me see any adjustment screws. I do see what looks like places the high speed and low speed adjustment would be but they are covered. Are there any adjustments on these carb's? I think its going to be a carburetor rebuild but if I can adjust the mixture and get it to work I will.

[KE4AVB]

The manual only shows one possible mixture adjustment which is the idle mixture. Refer the following image item '"K" should be it. It may may capped or it may not even be there; not all of these has this adjustment. The only other adjustment is idle speed "N".

Keilin one barrel is used per you spec number.

[dropzone]

That's what i am seeing also, but I know some times the manufacture wont show some things they don't want us to mess with. I do know these carbs have a accelerator pump I'm tinking it might be the Diaphragm or a blockage in the accelerator pump jet. The guy I got the motor off of had it in a shop that I know for a fact is a shady operation so who knows what they did to the motor. It's looking like a carburetor rebuild is in my future. Unless I can find an alternative, is there a older style carburetor that will work on these motors?