Since that thing has 3 carburators, I doubt that all three have pluged up at the same time.

Check the Fuel Filter then the fuel hose and bulb. These can deteriorate quickly and collapse inside the hose.

When it dies is the Bulb collapsed ?

Otherwise I'd look at the electrical. I'm not sure if that motor has a safe mode where it'll limit itself to 3000 rpm and 3 cylinders if it sences something wrong.

Three parts to the electrical .. PowerPack, Stator and trigger. Also if a magnet has come out of the flywheel.

Goodluck.