Auto Electrical Starter Motor

Internal-combustine (IC) engines must be started by separate system because they cannot self-start like electric motor or steam engines. When starting these engines, considerable resistance resulting from compression, piston friction and bearing friction (static friction) must be overcome. Frictional resistance is highest at low temperatures.
The starter (also known as the a starting motora ) must rotate the flywheel at a minimum starting speed overcoming these resistances. It must also continue to support rotation during initial combustion to maintain momentum until the engine can sustain operation.