Took it out shooting and it doesn't eject. It extracts it from the chamber but then just leaves it laying over the next round. What needs to be fixed?

New ejector ?

Ejector spring is broken. A little looking will find that is the weak point in the 1917s. Last time I needed one I had a bit of trouble locating one. Good luck

Where exactly is the ejector spring located?

The best thing is to replace it with the coil spring type. Never have to worry about it again. You could also modify your existing ejector with a coil spring. I've done them both ways:

BSA,

Where can I find a coil spring type ejector Sir?

I'd check Numrich or Brownells. I used to see them on ebay occasionally. MIdway used to sell them, but I believe they are discontinued there.

Thank you Sir!

Yep, good luck with it. If you can't locate a good one from Numrich, try modifying yours to use the coil spring. Don't cut the slots too deep, as that will weaken the ejector. A dremel with a cut off wheel is what I've used in the past. A good hardware store like ACE usually has coil springs that you can cut down to make work. Its a cheap easy fix that will/should last the lifetime of the rifle.