Took tank off weed eater and not sure how the lines go back on

Carb or filter
. replace fuel filter in tank while checking both pickup and return fuel lines.
remove carb and disassemble cleaning all parts with carb cleaner and some soft air blow . look for small screen its round and about 1/4 round in carb these are so small that the gas that's available gells and plugs the openings . try to use non-ethonal high octane gas and use echo 2cycle oil .

Take a look here...

change the fuel lines over on the carby
you are trying to feed fuel through the primer line when the engine is running and that is why it is cutting out

be sure fuel filter is on the primary fuel line in the tank.check primer bulb and fuel lines.also check fuel tank cap.vented cap may be stopped up

Use a hooked piece of wire to snag the filter through the fuel tank, it should pull off the fuel line.

If you haven't changed fuel filter in awhile, do that as well.
look here...

Get a new line the same size and length of the old one. Get the filter out of the tank. If it is as I think, it has a barbed end that goes into the outlet hole. Take your new line, fit it onto the filter end and make sure it is all the way on. Take the other end of the line and cut a taper on the end. Thread the end through the tank, into the outlet hole and aissist it so your filter sticks through the tank hole. There was a ring on the outside of the tank, on the line. Take that ring and run the ring over the end of the tube up to the filter bottom. Make sure it goes all the way up to the bottom, and tight.Square off the end and slip it onto the carb...Good luck...Lee

be sure the line in the tank did not disconnect. that would cause you to pump all you want but never get a drop.

Where is the fuel filter?
All gasoline engines have a fuel filter on the end of the fuel line in the fuel tank. Weed Eater recommends changing the fuel filter yearly. To remove the filter,
1. drain the fuel from the unit,
2. Pull the filter from the tank through the gas tank opening and remove it from the line,
3. Install the new filter on the fuel line and drop back in tank.

According to the Weed Eater Instriction Manual, page 8:

REPLACE FUEL FILTER: To replace fuel filter, drain unit by
running in dry of fuel, then remove the fuel cap/retainer assembly
from the tank. Pull filter from tank and remove it from the the
fuel line. Install a new fuel filter on fuel line; reinstall parts.

Tip: Sears outlets have a big selection of tune-up items for
blowers, etc. Try them for needed parts.