Starter: Electric motor that starts the movement when the car stars. The ignition key activates it.
Read more
The starter engine creates the first combustion engine spins until it starts and keeps on working by itself. It is like it "pushes" the main engine. As soon as the combustion engine starts, the starter engine is deattached and it is out of service until someone starts the car again.
Turned off one me replaced fuel pump starter does t want to turn over but the starter and relay are fine the fuel pump doesn’t turn on when I turn the key