I know I am four years late with this answer for you, but here goes, this is from the OP in this thread:
"I just used one of these to replace the 6116 located in the middle PCB location G5 and it works great."
Hope this helps.
Makes sense. Mine has the original metal gear. Seems like scanning first and getting some cast might be the best way. I wish our local small shop foundry hadn't closed in 2006.
"it could have been in a location that had it on free play and only charged admission to play."
Nope, SH does not have a "free play" option in settings, unless you get the later ROMs someone made, or unless you wire a "free play" button to the coin mech.