Have a 94 yard king 18.5 hp mower that has no spark or power to the coil. Have changed the coil,ignition,and all the safety switchesand still nothing.could you tell me what it might be

Hi,
Considering the year, it is a Briggs opposed twin and it has only one armature(ignition) that fires both spark plus every revolution. Each cylinder only makes power every other revolution alternately. Briggs part #394891.
Peace,
Clarke