71319038 Ballast Resistor for Coil (BTZ)

This electrical resistor is switched in and out of the supply voltage to the ignition coil. The ballast resistor lowers the voltage after the engine is started to reduce wear on ignition components and allows the coils to run cooler. It also makes the engine much easier to start by effectively doubling the voltage provided to the ignition coil when the engine is being cranked.