If tapping on the starter helped, then chances are the starter is going bad. Yes, you could replace it. Before doing anything, disconnect the negative battery terminal. Then it is just a matter of removing a couple bolts that hold the starter in place and removing the wiring from the old starter and replacing it the same way on the new starter. When you are all done, replace the battery terminal and it should be fine.
Let me know if you have other questions.
Monday, August 12th, 2013 AT 9:25 PM