I need to learn how to adjust these things. I'm working on a game right now and when I test the coin mechs the quarter always falls in the coin return. I know there is a screw you can turn if the quarter is getting stuck halfway down but I haven't found a guide anywhere that talks about this problem.

It's a Police Force and who knows what brand the mech is or how much it's been used. We just stuck them in there. However, the game is way off level since the shop floor is basically cheap concrete. Will have to look at it more.