Weed Eater One

My weedeater one cranks but wont start.i replaced the ignition coil because the spark was yellow not blue. Still wont start. When i pull the rope it will start. I can smell fuel gettin to the carb. I cleaned the flywheel,im leaning towards the stator or valves out of adjustment. Stator has diode in it. This is my fourth season with the mower.