Thank you for the reply. If you do not have any suction at the carburetor, I recommend taking the intake off at the engine block. Then hold your hand over the hole in the block. Once you have it sealed, turn the flywheel by hand. You should feel the suction. If you do not feel the suction, the valve is opening, and closing the problem could be a blown head gasket, broken connecting rod, or the rings are not sealing against the cylinder wall. If you do have suction, the problem is in the intake tube or the gaskets on each end.
I hope this is helpful. Please let me know what you find.
Thank you for using Manage my life.