Tonight I went to start my Craftsman lawn tractor to mow the lawn - it cranked and cranked but didn't act like it wanted to start at all. I went and grabbed a can of starting fluid and sprayed a little in the carburetor. The engine fired for a second or two, just long enough to use up the starting fluid. I pulled the fuel line loose from the carburetor and gas flowed out just like it should. I noticed that in the bottom of the carburetor there is an electric fuel solenoid - could it perhaps have burned out? It's like gas gets to the carburetor but is not getting fed to the engine. I just mowed about a week and a half ago and it ran great. My engine is a 17.5 HP Briggs and Stratton engine model #31C707.