I am replacing a primer bulb in a chainsaw and the lines are gone so i need to find out which line goes where

Short line on primer bulb goes to the left side of the carb. The long side on the primer bulb goes to in the fuel tank as the return line.

I can't give you an actual diagram but a I can try to explain how it should go. There is a line with the filter in the tank that goes to the bottom of the carb, there is another line from the carb that goes to the in port of the primer bulb, the out side of the primer bulb will go back down into the fuel tank. The primer will pull gas from the tank through the carb into the bulb then return the gas from the bulb to the tank

If you need further help, I’m available over the phone at https://www.6ya.com/expert/kelly_69a0cf1b13789df1

The fuel line from the tank with the filter on the end goes to the carb inlet, closest to the metering cover usually a chrome cover held with four screws, the other conection on the carb goes to the suction side of the primer bulb, normally the shorter of the two conections, the pressure side of the primer goes back to the tank, this pipe just sits in the tank to act as a return, just remember the primer pulls fuel from the carb, into the bulb, and back to the tank.

I just did a primer bulb not too long ago, but I don't remember what equipment it was on. They are generally easy to replace. First, remove anything that is retaining the bulb assembly, such as cover plate. On my Homelite chainsaw, I simply pried it out with a small screwdriver.
The replacement part itself has two barbed stubs that the two fuel line hoses push onto.
Make sure that you keep the fuel line tubes above the fuel level at all times to prevent leakage.

If the saw has a primer bulb, then you require one line from it's output out to the tank return. Another line runs from the carburetor outlet to the primer inlet. Make sure that you use original rubber lines, not plastic replacements. The primer ports are found by trial and error--hook the filtered line directly to one primer port and leave the other port open. If the bulb is in good condition, and correctly connected to fuel, the bulb should fill with fuel after several pumps. If nothing, reverse the port connection at the primer--and pump test again. One of these two connections should allow pumping to occur. When you get pumping, install the tank return line to the empty primer port. Remove the filtered line from the primer and install on the carburetor. A new piece of line runs from the now empty primer port and connects to the output port on the carburetor. If the carburetor lines are correct, you should be able to pump fuel through the carburetor body and out to the primer bulb. If nothing happens, you may need to swap the carburetor lines, and you will likely need to service the carburetor. Hope this helps!

Fuel Line Replacement by SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0

• The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
• If the saw is equipped with a primer, the output line from the carburetor connects to the suction side of the primer bulb (once bulb is collapsed it draws fuel from the tank through the carburetor to refill the bulb as the bulb refills).
• The pressure side of the primer returns any excess fuel to the tank as it is depressed.

HTH
Lou

Fuel routing:
Tank to carb (filter on free end in tank, replace annually)
Carb to primer (primer sucks fuel through carb)
Primer to tank (primer returns excess fuel to tank) HTH
Lou

I have a McCulloch 3200 chainsaw with a cracked primer bulb and all the fuel lines were gone. I cannot locate any information on routing these lines to the carb. I have a new primer bulb and 3/32x3/16" fuel line. Please help me solve this problem.

the large hose from the tank goes to the suction side of the primer bulb. The large line from the out put side of the bulb goes to the bottom inlet of the carb.
the small line goes from the top outlet tube on the carb back into the tank near the primer bulb.

Line with filter goes to carb inlet,
Line from carb goes to inlet side of bulb.
Line from bulb goes to tank