tried doing a search couldnt find direct answer.

I have new alternator, battery,,, i know my starter is mess(needs to be changed) But can it drain my battery?

I have to boost it everytime to start it up(still gives me a hard start.But it starts)

 

yes a starter motor will take as many amps as it can....that said check the starter connections make sure everything is tight, but first of all check make sure battery terminals are clean/tight, after checking all that take the starter to advance or auto zone and have it checked

 

thanks,,

 

Do it quick, if you keep pulling waaaayyy to many amps out of the battery with a start, you'll fry it. Then your alternator has to work 3 times as hard to charge it back up and you end up with damage to both. It's like dominoes.
Good luck.

 

cranking low amps from a bad battery can damage a starter too