94 300ex starter

whats up people. im new to the board. my 300 ex wouldnt start so i jumped the battery and it started right up . bought a new battery and it still wouldnt start. even with cables this time. its clicking when i hit the start button but nothing more.so i gave the starter a tap with a screwdriver and it fired up. what im asking is... is there a chance its NOT the starter and could be the selinoid instead? wanted some feedback before i buy a new starter..any help would be greatly appreciated . thanks