I was sceptical at first due to the part was used and I figured it hadn't been tested. Well since I couldn't afford a new one I had no other choice. Soon as we put the part on and after a couple of tries it started and stayed running. Something it hadn't did before we purchased the cdi box. Just wish we would have knew about the cdi box before we spent a lot of money taking it to different shops for them to say they could not find what the problem was.