I run this same speedo and love it I have never had any problems check a few things make shure you have programmed it for your radio also make shure you are in the proper brushed/brushless mode for whatever motor you have and if you are running sensored based motors you need to make shure your sensor wire is plugged in correctly also make shure your throttle channel on your radio is not in the reverse mode hopefully it is one of these things causing your problem
Rick
Last edited by Rick Zep; 07-01-2009 at 05:23 PM.
Reason: added a symptom