go kart engine starts with fuel in cylinder, then quickly dies

[fuhgettaboudit02]

fuel is definitely getting to the carb, but it seems like its not reaching the engine. clogged carburetor?

[RBM]

Clogged jets or stuck float

[Oren]

As a test I would pull the spark plug and pour a small amount of fuel in the cylinder (install plug and wire) and see it the engine fires.

Small amount = tablespoon or less.

I agree with the clogged jets / stuck float ... spray the float and jet/seat well with a carb cleaner. Ensure it moves freely and is not binding. Check the gasket on the bowl and or replace. A gasket can become saturated in time and it doesn't seal, causing a vacuum leak...

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

[timbirr]

Oren and RB are telling you true...