Before throwing your money at it check all of your grounds. From ignition switch to inside of engine. Check your tether switch, check your neutral switch, your ignition switch. There are more reasons for a no spark condition than the coil, stator, trigger and switchbox. One may save you some money. The test for both the stator and trigger are simple and performed with an inexpensive multimeter. CDI electronics will have the specs for you. Run through the rarher simple procedure before dropping your money on a hunch. You did not leave a model number, is this an electric start , tiller, control model ??