I have a toro snowblower with no spark a magnet broke off the flywheel and damaged the stator assembly and coil, it ran perfectly fine before. I bought a used assembly and i can't get a spark could the magnets be demagnatized or the coil be bad ? I had a small engine mechanic install the parts and he suggested i just buy a new engine when he couldn't get any spark but i would just like to get this engine running.