The side of it.
The starter has failed and needs replaced. Somthing inside the starter makes connection when you tap it.
starter is going out.....its happened to me plenty of times
In some cases that works but it is not fixing the problem. Sooner or later a tap won't work anymore and you will be stuck.
Probably not the starter.
When you tap on the starter, what you are actually tapping on is the starter solenoid; a device mounted on the starter (on most cars) that engages the starter gear to the engine gear while simultaneously connecting battery power to the starter. When the start solenoid gets to the point where you have to tap it, the remaining life is difficult to predict because it really depends on what's going on inside the solenoid (e.g. how many start cycles it has completed, exposure to elements etc.). However, the good news is you can normally go to an electric motor repair shop and buy a new solenoid for much cheaper than the whole starter, and in many cases, much easier to replace.
crawl under truck and tap the starter with a hammer crawl under truck and tap the starter with a hammer
my first thought would be to check the starter . if you can tap on the starter and it starts after that..you have a bad starter .
Bad starter solenoid. Bad brushes more likely (worn out)
the solenoid is bad on the starter. soon after this problem starts tapping on the starter will not work either any further questions email me at crazyarmydad@hotmial.com
I had the same problem. Your starter is probably going out. You can actually lightly tap the starter with a hammer and that gets it going.
Sometimes if the starter is worn out, give it a good whack with a hammer. It may start for you one more time. It's worth a try. If it does start after a love tap you now know the starter is tired, replace it.