Hi, i have this trailblazer ser # KG087836 that keeps burning the Exciter fuse F1 in manual. This unit has done this since new, if you have on more than 50 ft of leads. 50ft ground plus 50ft positive cable.Have only every used this to stick weld and the unit currently has 350 hours on it. I have used other units identical to this with way longer leads with no issues. I have tried heavier cable with no success. I figured i would ask before I break down and take it in an pay someone to look at it again. Thanks in advance for any help you can provide.