I have a 1975 Gotltlieb Abra Ca Dabra EM machine.  At the end of each game, the ball kicker kicks out the ball again.  This requires that I manually shoot the ball and let it get back down the board before the new game resets...any suggestions about how I can solve this problem? thanks

Could be a few things:
- ball count unit misadjusted or dirty contact(s);
- 3/5 ball plug selector not making proper contact;
- last ball in play relay (BX, if equipped) contact dirty or misadjusted (or latch issue);
- game over relay not tripping correctly (or contact) when last ball draining;
- misadjusted contact on score motor;
- splash of solder (short) on a switch/relay stack somewhere;
- open or dirty set of contacts on the outhole relay.

You probably will need to observe the relays when the condition is occuring,
and use the schematics to see what could cause this issue.

Good luck !
- Sylvain.

Had a similar issue with a 1976 Flip Flop, my bet's on this one:

Quoted from sylvain

- ball count unit misadjusted or dirty contact(s)

Daniel