I was doing some science fair experimentation with my kart today, and I needed to test how far the kart will go at a set speed on different amounts of fuel (not my whole project) and I was doing a test with 150mL of fuel, and it wouldn't start.... It WOULD start with 50 and 100, but not 150... It seems that there is NO fuel in the fuel filter chamber(?) and just vapor. After a few adjustments of the idle screw, it started right up, but still no fuel in the fuel filter chamber (is that what it's called?). WTH. There was fuel in it from the other trials?
...?