1 New Replacement Troy Bilt Lawn Mower Model 12AVB26M011 Carburetor. This Is A Troy Bilt Model 12AVB26M011 With Briggs Stratton 700 Series 190cc Engine Pictured Below: Replace your carburetor if your machine starts up on choke then dies, if it starts with starting fluid then dies or if it needs choke on to run. It's also a good idea to replace your fuel and clean out fuel lines. Most Problems With Equipment Not Running Or Having a Hard Time Running Is Due To Carburetor Problems. Please check image and compare with your part before ordering. If you have any questions email us and we can look up your part. Custom Service Is Our Goal! Please Feel Free To Email Us With Any Questions. Thanks For Looking!