Welcome Gunnysack.
Please include the year or model/ serial # when posting.
Sounds like the fuel system is starving for gas??.
Check/ replace the fuel pump diaphragm.
Check/ replace the fuel squeezie and the connector at the motor.
The connector at the motor has rubber seals and they go bad and it sucks air at that point.
The squeezie has a valve it can stop the gas from flowing.
Rebuild/ clean the carb.
Install a small filter between the carb and the pump, stops a lot of problems.
