Trimmer....Homelite 01-98, UT20680, Ser. HT0051254, Carb Zama C1U H39 79A
The trimmer idles too fast, even with Idle speed screw all the way out. The throttle lever closes all the way. The hi speed is a fixed post, and I have tried adjusting lo speed mix screw, but head still spins (both mine and the trimmer). Any suggestions?