Notice to customers: There are two types of stop switches: Normally Open, (NO) or Normally Closed, (NC). Switches in this catalog are typically of the Normally Open (NO) type. They work by GROUNDING the primary ignition lead when activated. Note that they will not work on electrical systems requiring a Normally Closed (NC) switch, which works by OPENING the circuit when activated. NC switches are typically used on battery type ignitions, which may have an ignition key as an identifier. NC switches are generally found on newer machines. If in doubt, check your machines wiring schematic.
