Murphy push/pull DC Solenoids provide single unit versatility for engine applications, such as shutdown.  Unlike most existing solenoids, this line features three-wire circuitry, which reduces the chance for burned up coils due to incomplete seating of the plunger. If the plunger does not “seat” due to improper linkage adjustment, the solenoid coil will release the plunger.  This allows it to return to the “tripped” position, thus overcoming coil burnout. A choice of two models and two voltages is available.  All models come complete with return spring and rubber seal boot. Models RP2307 give a full one inch (25 mm) stroke at 11 pounds (49 N) and hold up to 23 pounds (102 N) at full voltage, continuous duty.  They will operate at any stroke less than maximum.