Lt 80 n1989
#2
Welcome to the forums. 
The only vaccum line goes from the carb to the petcock.
Looking at the carb from the right, there are 3 holes. The lil hole/port closest to the motor is the vaccum.
Middle is the brass fuel supply and the front port is the carb vent.
I forget which port at the petcock the vac hose goes to but it isn't hard to figure out.

The only vaccum line goes from the carb to the petcock.
Looking at the carb from the right, there are 3 holes. The lil hole/port closest to the motor is the vaccum.
Middle is the brass fuel supply and the front port is the carb vent.
I forget which port at the petcock the vac hose goes to but it isn't hard to figure out.





