My JD LX186 LOSE ALL POWER DASH LIGHT HEADLIGHTS NO POWER AT ALL this is a john deere lx 186

SOURCE: I have a lx 255 john deere wont start

You have a defective ignation coil. When the engine gets hot, the winding in the coil opens and the engine stops. After it cools down, it will again make contact and start again. If you don't know where the coil is, follow the wire from the spark plug. The spark plug wire is attached to the coil from the factory. It's easy to replace with a 1/4 inch socket set. Set the magnet to coil gap with a standard business card.