No, it is not the battery, I have got it running but not sure why. I think there must be a contact sticking. I hit the voltage regulator with the handle of a screwdriver, everything powered up. the engine fired up and ran for a while then it shut down, had to hit the regulator again and it ran fine for the rest of the afternoon. This morning, everything fired up fine, I started backing it out and it quit running, had to hit it again and now is running fine. This is a new regulator, had the same situation with the old regulator.