I bought a Suzuki DF 2.5 and from the beginning it has had a bad stumble off idle. The dealer has tried to help, but it is really not much better. The first time I took it in, he replaced the carb and it was better after that, but after a few trips it was back to the bad stumble. I took it in again and they changed the jets but that stumble is still there, it's better but not really right. I have 8 small engines that I maintain on my own to do my own yard work, both 4 and 2 stroke and they all run better than this engine does. Any suggestions other than taking it back a 3rd time? I'm starting to wonder if I should have bought a Yamaha or a Tohatsu instead! I have a 17 year old Toro snowblower with a Suzuki 2 stroke that has been great, but this one has been trouble from the beginning.