The problem is the carb needs to be adjusted. Then when you do touch it, it slows down or dies out when you think you are giving it gas. I dont know if anyone here has had a problem with there small machines, but when you start it, it sounds like you have the fuel trigger pulled all the way back even when your not touching it. If the carb has a built in primer, the fuel line closest to the primer bulb is your fuel return back to the fuel tank while the other fuel line is your main fuel feed.ДЄ few of these carbs you will need a special tool that cost about $5-$8 to adjust the carb since the adjustment screws will not allow you to use a regular flat head screw driver. IВ have not worked on chain-saws or gas blowers yet but I guess it would be the sameВ since it is a small engine.ДЇor those small engines like weedeaters, chain saws, blowers and ect. I hope this helps some for those who are tinkering with their weed-eaters at home. Definately need a long pair of needle nose pliers to pull those lines in thru the tank. Oh, getting those rubber hoses into the tank is a pain in the ass and a little time comsuming. This is a breather valve so you dont want it submerged in fuel when priming the carb. This line should be about 1/4' to 1' below the fuel cap hole. Now thatВ thick line from the tank is connected to the big connector on the primer bulb base.В The thick line inside the tank should have a breather nipple attached to it. Now you need about 3' of small fuel line which will go from the top connector of the carb to the small inlet connector on the primer bulb base. Now that same line goes from the tank to the bottom connector on the carb. Replace the line back into the tank just like that because you want the fuel filter/line to flop around inside the tank. Pull out about 1' of fuel line from the fuel cap opening and attach filter. When replacing theВ thin line, it connects to the filter inside the tank. The thin line is your fuel feed while the thick one is your fuel return/breather. The weed-eater has a thick line and a thin line both coming from the fuel tank. The fuel linesВ on the carb may be a little confusing so I will explain the lines and how they hook up. Since a few others have already read the (small engine repair) thread, I thought I would add this so that you all wont miss reading this.

Craftsman fuel lines for weedwacker