I have not checked to see if the tank vent was clogged, will do that this evening. I have removed the tank and cleaned it out and verified that gas is flowing freely through the petcock. While cleaning the carb I sprayed into the pilot area and cleaner sprayed out so it seems that it is not clogged. Now for a noob question.... how do you set the float level. I am considering getting a rebuild kit. What all is included in a rebuild kit??