If the choke does not seem to make a difference, take it loose at the carb and pop it out and give it a good cleaning. It works off of vaccum so you might give it a once over for a vaccum leak. Carefully, spray some WD-40 around the intake boots and see if it raises the rpm.
I have also had problems with the fuel filter stopping up from time to time with something that looks like silicone. Seems to be something coming loose in the fuel tank and being picked up in the fuel. Take a very close look at the filter for small foreign crud. I bypassed the stocker and put an inline filter where it comes out of the tank and is easier to see. Even with an electric pump, my filter does not run full.
Last edited by Charger; 11-30-2011 at 01:03 PM.