I recently purchased two of the new Exmark Lazer z 60's with the new RED technology. Well, one of them has been in the shop for a week now with a whole 23 hours on it! No power. It will start, but the throttle will not respond thru the toggle switch and battery light blinks. Was hoping it was just the battery or a safety switch / small electrical issue. But NO, it's a computer board or something like that. Here's the good part...the machine is so new, they don't even have a part number for what's needed! Apparently, I'm the only one so far with this problem, according to Exmark. Time will tell. On the other hand, the other one is awesome and very fuel efficient. So I'm at 50/50. Lol.