... use mechanical protector, when the solenoid can’t pull to the end, it has 4-5mm supplementary stroke, it would ... to solve this problem.Third, the solenoid can’t pull in to the end. If the install dimension is not right, ... g. engine controller, water preheater, automatic voltage regulator, generator synchronizer, genset controller, power factor regulator, fuel solenoid, charger for engine start ...