Starter/Clutch Interlock Switch

The starter/clutch interlock switch is designed to prevent starting the engine unless the clutch pedal is fully depressed. The switch is connected between the ignition switch and the starter motor relay coil and maintains an open circuit with the clutch pedal up (clutch engaged).

The switch is designed to automatically self-adjust the first time the clutch pedal is pressed to the floor. The self-adjuster consists of a two-piece clip snapped together over a serrated rod. When the plunger or rod is extended, the clip bottoms out on the switch body and allows the rod to ratchet over the serrations to a position determined by the clutch pedal travel. In this way, the switch is set to close the starter circuit when the clutch is pressed all the way to the floor (clutch disengaged).