More history might help toward making suggestions. Such as:
1. How old is the unit or approximate hrs to need a carb? Sounds like itâÂÂs sucking air at a connection.
2. Do you feel good compression starting and see/hear good exhaust when it reevs?
3. Is this the 1st season of use on the new carb? How long and well did it perform on new carb?
4. Are you using Stabil or fuel treatment while using/storing and how long is it stored?
5. Have you checked all fuel lines and carb for a tight fit vs sucking air.
6. Have you spot checked diaphragm and fuel screen in the carb?
7. Have you tweaked carb mixture screws?