I can't prime my carburator on my Echo GT200r weed wacker?

Check out the tubing to the carb. If it is good then the top part of the carb with the check valves is defective. If so, you need a new carb since those suckers cannot be fixed.

Lots of help videos on youtube.
ryobi weed wacker wont prime YouTube

you can adjust the screws on the carburetor, 1/8 of a turn at a time, Tim

Use only FRESH gas. 2 cycle motors are sensitive and will not run on gas that will still power a lawn mower.

I fought with this for years before realizing how gas degrades over time - especially in plastic gas cans - as the important fuel molecules can evaporate right through the plastic.

Use a quality 2 cycle oil and mix to proper ratio for the saw.

You need to put it in full choke. If it is in full choke and still won't start, try pulling the trigger a bit. once you have it started in full choke, back it down to half choke and hold down the trigger until it catches. Once it catches take the choke off entirely WITHOUT removing your finger from the trigger.

if there's a primer just hook the lines up. when priming if the gas is going back into the tank then its correct. if not then swap the lines.

Maybe go to Echo's website and check with them.

I had the exact same problem with gas soaking my back and found out the yellow fuel discharge tube that comes out of the carberator was not inserted into the rubber gasket on top the fuel tank. The gasket has 3 holes in it for 3 tubes and the yellow tube fits into one of the holes. Hope this helps. It is a bit difficult to get the tube in the hole, but at least if you know what you are looking for you can get it to work

you can check the filter in the tank just blow the filter out if that don't work check the lines going to the bulb if you have change the bulb out change the lines around

The esiest way to figure it out is to take the line with the filter and put it on one nipple then push on the primer a few times and see if fuel comes out of the other, if no fuel then switch the line over to the other. But if im not mistaken the filter will go to the bottom.