While mowing, and out of the blue, the engine started to hesitate then smooth out, hesitate, then smooth out. Classic running out of gas. I jerked back to the house and discovered that I had half a tank left. Discovered that the air filter was clogged up. Cleaned same. Bought a new in line gas filter. Disconnected gas filter, disconnected hose from carb, and bottom of gas tank (no fuel pump, I assume that gas is pulled into the carb by its intake) Blew through each section of hose and all were clean. Put it all back together, mowed for about ten minutes, and problem came back. Manual choke works. I eyeballed it when air filter was off. Possible carb adjustment? But, how could that just go wrong suddenly? Tractor is 3 yrs. old and never abused. All trouble shooting thiings, as written in manual, check out. Now what? Anyone?
Oh…Sears Craftsman, Briggs and Stratton engine.