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.
For some reason I couldn't get on the you tube video. But as a rule when a engine hunts, or as you said go's up and down the carburetor high speed jet is partly plugged. I know you said you cleaned the carburetor but its something you might of missed.
