Ok for you diesel mechanics... I bought a new zd326 about 2 weeks ago. Today I was mowing with it and I noticed that my right side fuel tank was getting low so I switched to the left. After about a min. it sputtered and quit. So I thought that I had shut off the fuel but after looking I didn't. I cranked it and after about 30 secs it fired up. From there on it ran like crap. No power, sputtering and just not running right. So i continued to run it to see if it would fix itself some how and it never did. Finally I loaded it on my truck and it almost didn't make it up the ramp at full throttle. I drive to my shop to unload it and the thing starts and runs perfect. I ran it for about 15 min. and no problems whatsoever. I'm stumped and I don't know alot about diesel motors. What are your thoughts?