Hello solar man, I read a post of yours regarding a dt55 that would not idle and struggled to start it ran fine on the throttle and that is exactly what happens with mine. I couldent see a result . I have to choke it and turn the thing over for a good while till it catches and it won't idle and stalls out. Before I start ripping the carbs apart my own diagnosis is possibly the 25cent oring on the fuel coupling letting air in . Or idle passage ways in the carbs that I don't want to get involved in if I can help it. Your wisdom will be greatly appreciated. Many thanks Harvey