Its not supposed to idle, but it's not supposed jump either. It should take off smoothly.
When the accelerator pedal is first depressed, the engine should just barely start to run, then pick up slowly as the pedal is pressed.
This can all be adjusted and fine tuned between the accelerator rod adjustment, micro switch adjustment, carb adjustment, and cable adjustment.
First is accelerator rod and micro switch. Under the accelerator pedal there is a tie rod that is connected cam. When the pedal is depressed the cam lifts off the micro switch, which activates the starter solenoid, causing the engine to turn over. At the same time the cam also pulls the accelerator cable causing the throttle to advance. (This is really where your governor speed is adjusted) If the linkage is adjusted to where when the accelerator pedal is just baerly being pressed, & the micro switch activates, the throttle cable will be pulled much further, and you will get the most speed out of your cart. If the linkage is adjusted to where the pedal goes 1/3 of the way to the floor, then activates the micro switch your, cart won't go as fast, but you will have better pedal feel. This is about a factory setting. (Also, be careful not to get this setting too close because the brake pedal can move the accelerator pedal when the park brake latch is activated. This can cause the car to turn over only when the keyswitch is on without touching the pedal)
Next adjust the carb. There isn't much. Just adjust the idle mixture screw. (This isn't crucial, but I like to do it first). Then make sure the stop screw isn't touching the throttle arm with the throttle closed.
With that set, adjust the accelerator cable. In the black electrial box the cable comes off the cam and goes throught the box. There are two stop nuts that secure the cable to the electrical box. Adjust the cable so the throttle on the carb starts to open just after the micro switch engages and the engine turns over. Lastly, if you prefer, you can adjust the throttle stop screw to your desired speed. Due to the stop and go nature of a golf cart, I prefer to keep it all the way down to keep things as smooth as possible.
...There is also a yellow cam behind the foward/reverse switch that can be pulled out and turned. This allow you to rev the cart up in neutral to test your adjustments.