Just purchased Murray 42571x8a. Installed new battery worked fine until I turned it off. Tightened connections and started fine. Turned off again and can't get it started. There is no sound when I turn key. The battery is fine power seams to be getting to starter per meter test. I have checked and replaced the fuse. I have also cleaned the seat switch. I tried checking for power with meter but there was none. I don't know if it should register power or not. I've only cut 10% of the yard and the wife is not happy. Please advise.