BobRip said:Might be trash in the fuel tank outlet, fuel line or the fuel filter. I have had this happen twice. Does it run better if you choke it a little while running at high speed. This is a sure indication of fuel starvation. You can disconnect the fuel line from the fuel pump and blow air into the line back into the tank. Don't use your mouth. You could drain the tank and then disconnect the fuel line at the tank. The trash is most likely at the tank outlet. It is smaller than the hose. Call me if you have any questions. Or PM.
If when you let it sit for a few minutes it starts and runs for a while this is another indication of trash in the fuel system.
May need to bring it by for your help ....