answered question 5/8/2009 I Have A Craftsman Self Propelled Lawnmower. Usually Both Of The Front Wheels Turn Constantly. Today I Noticed That Only One Wheel Is Turning. In Other Words Only One Wheel Of My Front Drive System Is Working. What Is Wrong And Can I Fix It? I have a self propelled lawnmower that the front wheels will only engage when I jig gel the throttle, Half of the time I have to push it. (my back!) It feels like the belt is slipping.