I Have a TB200.Had prob with it staying running. I bought a new Carb, cleaned out the tank and made sure the filter in the tank was not stopped up also .cleaned out the fuel line while i had the tank and carb off also. Put everything back together and it cranked on first pull then shut off bout 30 seconds after. It will still continue to crank and run bout 30 seconds. I'm stumped?? any suggestions??