How do you start a car by tapping starter with screwdriver?

You cant really, sometimes shadetree mechanics can get a few extra weeks out of a starter that has a bad solenoid by hitting the starter with something. After a while that wont work either. You can use a screwdriver to cross connect the two large terminals on the starter to bypass the solenoid but its not good to do and also dangerous. If you have some kind of ignition problem that you cannot figure out but still need to operate the car in emergencies or to keep from losing a job you can buy a remote starter switch from an auto parts store ( about $10 ) and connect the alligator clips to the 2 large terminals on the starter, then with the ignition switch in the run position press the button to start. Tuck the switch away under the hood for the next start.
You cant really, sometimes shadetree mechanics can get a few extra weeks out of a starter that has a bad solenoid by hitting the starter with something. After a while that wont work either. You can use a screwdriver to cross connect the two large terminals on the starter to bypass the solenoid but its not good to do and also dangerous. If you have some kind of ignition problem that you cannot figure out but still need to operate the car in emergencies or to keep from losing a job you can buy a remote starter switch from an auto parts store ( about $10 ) and connect the alligator clips to the 2 large terminals on the starter, then with the ignition switch in the run position press the button to start. Tuck the switch away under the hood for the next start.