My 1300cc volks engine wont maintain an idle (even with adjustments with the idle screw and air/fuel screw) and I had to constantly pumping the gas pedal slightly to keep it running. If you release the pedal even a steady pressure the engine tends to stall except at near and full throttle. I had myself removed it (the 2 nuts on the base were not as tight as expected) and cleaned with a 3M carb cleaner. Since I had no spare gasket for the bottom, bowl / venturi and accelerator pump, I had them used again. Now the problem is it wont start and no squirting gasoline if I view the venturi even if it has gas in the bowl. Question is can I use the silicon gasket? and what went wrong with my procedure. Help me guys!