Coleman generator idling issue

Any help would be greatly appreciated, I inherited a coleman 7500W generator with a briggs and stratton 14.5hp engine. I was told it had very low hours on it. When i received it blew smoke upon startup. I went through the whole thing, changed oil, filter, fuel lines, cleaned the carb out, spark plug etc. Yesterday it was running perfect but with a bit of smoke still. After checking a few other things i started it back up and now no smoke but the idle is jumping up and down. I made sure there were no intake manifold leaks and also cleaned the carb again just incase. Please Help. I have attached a youtube video of the generator running. Previous gas was drained from tank and replaced with new.

https://www.youtube.com/watch?v=Ns0ezJW-okY

 

Welcome to the forums.

Your posted video is private.

You changed the carb out..... for an identical unit ?
You may not have gotten the governor set up correctly.

 

thank you for your response, it is the stock carb. no swap out. i just made the video private, sorry about that

 

I can see video now.

The governor is hunting. You may not have the linkage back in the correct hole on the carb or possibly a spring problem.