SOUNDS LIKE A CARBORATOR PROBLEM TO ME ALMOST LIKE THE FLOATS MIGHT BE STICKING I ALSO LIKE THE BULB IDEA I THINK THAT WOULD MAKE SINCE. RIGHT NOW THE REASON THE MOTOR DOESNT RUN CORRECTLY IS BECAUSE YOU HAVE A PERIOD OF TIME WHEN YOU DONT HAVE ENOUGH FUEL.
LET US KNOW WHAT HAPPEND WITH THE MOVING THE BALL. THIS CAN BE FIGURED OUT PRETTY EASILY KEEP US UPDATED