Jimbolden, WELCOME to the forum! You'd be better off starting your own new post, instead of adding into a 2-yr-old dead thread. In the meanwhile, sounds like you need to lower the idle speed and maybe clean the carb or adjust the throttle cable. What engine and kart do you have? We love pictures here.
Karter98 - Instead of maybe suggesting he clean the carb, adjust the idle, etc... you go straight to "Change the carb"... Really???
In truth, some of the Tecumseh carbs are top-notch, with adjustable mains, etc. some of their later ones aren't as good, but they're no worse than any other comparable carb. Besides, where's the DIY in swapping parts?