I have a brand new Super Recycler (model 21386, SN 409164423) with a Briggs engine (model 104M020254F1, SN 2008191917003) that sputters while mowing. It started doing this the first time I mowed and appears to be a common problem among other owners. I contacted my local Toro dealer and they said it’s probably a dirty carb (after only 15 minutes of use?) or bad gas (I used fresh non-ethanol, 91 octane). Another person with the same issue had his repaired and said there is a service bulletin on it. His carburetor was replaced and it fixed the problem. His repair receipt said “See bulletin DSB-113/DBS-114”. I have no way of looking up service bulletins. Can anyone tell me what they say?