See attached photo. I picked up this 5.5hp White (MTD model 31AH6BHE790) unit at a great price… Has the Tecumseh 5.5hp Snow King engine. Yes, it is your basic 5.5hp MTD but it has electric start, scoop out shovel, headlight AND hand warmers. Everything works. It starts easily but doesn’t run great. I can tell someone has been into the carb. Bowl was spotless. It can stall a bit if the throttle is moved. If I pull the throttle down to stop it, it will usually backfire blue flame from the exhaust. Thoughts? Valve issue?