Small Engine Troubleshooting Problems? Ask a Mechanic Now.
If no spark, locate the coil, next tot he flywheel and remove it. Then check for spark. If no spark with kill wire removed, the coil has failed. If you have spark, the kill circuit is grounding out the spark. Here is link showing how the Briggs ignition works.
OK> the magnet and the coil is all that make the spark. No spark with kill wire off, it has to be coil!