Many of us own honda 2000 generators and letting them sit for a while without an occasional startup can have varnish buildup inside the carb where you need to run it at 1/2 choke to keep it from surging....... this video i found on youtube explains a very easy  procedure to fix the problem.

  I need to do this myself

Joe

http://www.youtube.com/watch?v=QhNy2lfJCEE