I bought a YM1510 diesel about 3 weeks ago. Seller started it for me to pull it up onto my trailer with no problem other than needing a jump. It needed a freeze plug which I have taken care of already and filled the coolant. Now I can not get this thing started. I did get it started one time and after running for about 30 seconds shut it down when the exhaust started spewing out a dark thin fluid, which I was later told was just condensation built up from sitting. I have replaced the battery (it was getting weak) and I also replaced the starter because it was in bad shape though still functional. That being said, the tractor cranks but will not start. I also bleed the system although I don't think it needed it. I am now at a loss as to where to go next. The manual doesn't help much and even when the temp got up to nearly 60 degrees the other day it still would not turn over. Any help or suggestions would be much appreciated. I am losing patience about to sell it and buy something already in running condition! Thanks for any help!