Have purchased a KingCraft 6000 watt generator, it runs fine but stays on high idle even without a load. I called customer service and they told me to adjust the carb. Screw. This idled it down but when you plug something in it does't idle back up. Is there another adjustment for this or is this the nature of this brand. Appreciate any feed back.

 

Are you sure your generator has a low idle system on it?
There is a good chance it doesn't.

This is usually only found on more expensive generators.
Now that you have tampered with the speed setting it will be important that you use either a tachometer or frequency meter to reset the motor speed correctly.

 

How close should the frequency be to 60 cps? Is 59 ok, is 61 ok?