^I have two carbs, a Zama and a Walbro, both from Ryobi's. I threw the Zama on today and it did the same thing. I took both carbs apart and both are perfectly fine internally. I took off the primer bulb and noticed that it does in fact draw fuel with the choke on. It fires maybe once, then stops. I turned off the choke and it stopped pulling fuel and does not fire at all. Im starting to think that maybe my tank placement it bad and that its pinching off some lines or I have an air leak somewhere. Im going to keep the primer bulb off from now on and plug the return line, but I also have to plug the hole in the fuel tank that the return line went to. Im going to mess with it more on tuesday, Ill let you guys know what happens, but please let me know if there is anything else I need to check!

Colin C