Have trouble getting this to idle. When I lower the throttle(about the opening that I use to start the engine) it dies. Air bleed screw 2 turns out. Needle 2 turns out. I've run through a qt. of 10% so it should be well broken in. Moving the throttle up and down during the break-in process. Any suggestions? Far too old to be chasing this. Can't see flying this if I can't slow the plane down to land.