It's not pumping enough fuel, cleaned the carb a couple of times, new fuel line, new impulse line, diaphrams seem good. It has a tilitalson carb with 3 lines coming to it, fuel line, impulse line and another running to the tank. What is the purpose of the 3rd line, can that cause it to not pump gas to the carb. It will start and idle a long time but if held wide open gradually leans itself out, also the high adjuster wont make it run rich at all. Steve