[Misters]

Sounds like it runs out of fuel...
Lean idle mixture
Low float level

 

[Misters]

There is an "accelerator pump". It shoots fuel into the intake {from the brass tube} when the throttle is opened.

The idle mixture screw will {should} affect the idle speed when turn in & out. In being closed{lean}. 2 1/2 turns out, normal. More than 3 turns would be rich.

Idle speed 1000rpm

 

[Misters]

Have U adjusted the idle MIXTURE?

You are pulling air from some where. Are there EPA tubes from the tank to a canister, to the carb?