I have a used zd326 I recently picked up at auction. It does have issues starting, and I read a related post in the forum, and I will try those suggestions. After I do get it started, the machine runs fine, and cuts fine. I was cutting for about 2 hours and wanted to take a break. I disengaged the pto, and reduced throttle. After the throttle was just above idle, the machine shut off, and would not start back up. This has happened twice so far. As long as its 50-100% throttle, its fine. Any suggestions?