The Mag Kill Relay for Use with Ignition Switch from Fuel Injection Enterprises (FIE) is designed for hot rods, race cars, and other vehicles that use a magneto ignition system with a standard 12 V ignition switch. Because typical ignition switches only turn 12 V power on or off and do not directly ground or unground a magneto, this relay provides the necessary interface to properly control the magneto ignition system.

When the relay receives 12 V from the ignition switch, it ungrounds the magneto, allowing the engine to run normally. When the ignition switch is turned off, the relay grounds the magneto circuit, instantly shutting down the engine. This ensures reliable engine control and safe shutdown using a standard ignition switch configuration.

Built for constant-duty operation, the relay is suitable for use with points-style magnetos commonly found in performance engines and racing applications. The unit includes a wiring schematic to simplify installation in hot rods, pulling vehicles, and other custom engine builds.

Key Features

• Converts a standard 12 V ignition switch to properly control a magneto

• Automatically grounds the magneto when the ignition is off to stop the engine

• Ungrounds the magneto when 12 V is applied, allowing the engine to run

• Constant-duty rated relay suitable for continuous operation

• Compatible with points-style magneto ignition systems

• Includes wiring schematic for installation guidance