Hello everybody I'm looking for some help with my smartech uno rc 1/5 scale car. Its a clone of a FG marder and it runs on a PT 28cc engine. The problem has occurred ever since I took the engine out to upgrade an engine mount. The car just will not idle. The idle screw is screwed all the way in and its still only just reaching a really low idle. I've leaned the engine to try and raise the idle, its helped but I'm afraid to lean it any more in case I'm damaging the engine! It has a ruixing carburetor, which I believe is a clone of a walbro 668? Any suggestions on what the issue may be? Thanks!