Hi everyone, I have a 743 that was running fine and when I went to shut it off it died before I could stop it. I didn't think much of it but the next day when I tried to start it, it would crank just fine but wouldn't fire. It has plenty of fuel in it so that's not the problem. I replaced the fuel filter and air filter and when doing so found a crack it the fuel line by the primer bulb. I fixed the line and it still will not start. When I squeeze the primer bulb to fill the fuel filter I can't get it to siphon. Any ideas? Thanks in advance.