My son just bought a Carter kart , it has no spark. We pulled the coil, cleaned it adjusted it. It has 2 kill switches which seem to work, I have continuity on both of them. I even pulled a coil off another 6.0 hp Tecumseh that's froze and nothing. What am I missing? I've been a car guy for 35 years, never played with small engines tho. Any help is appreciated!!