Carburetor needle & seat kit. Comes with installation instructions. The float needle allows fuel to enter the float bowl. If the float needle is stuck closed, the engine will not get fuel and thus will not start.
Carburetor float bowl kit
Fuel float kit for carburetor
Rebuild Kit, This kit is for several carburetor variations. You will only use the parts that match your specfic carburetor.
Overhaul Kit, 16 Horizontal, Vanguard OHV V-Twin 30 CID