It's the switch underneath the apron, not the outhole switch.

The game's on location so I don't have access to it. The switch should only register continuity (beep) when you press it and it clicks. Sounds like yours is stuck closed.

As I said before, it's the same part. Steve sent me that part number. That's the only place I know of that stocks them, though (or did).

There may be a problem with the way you're testing the switch. Gottlieb games use a weird hybrid switch/lamp matrix, but I am not familiar with the switch matrix and how it is wired on Gottliebs. Yes the switch could be causing an intermittent connection when the ball is ejected into the shooter lane causing it to "flutter." This prevent the CPU from properly ejecting the ball. I adjusted my old switch once to where it doesn't do this, ran about 20 or 30 test ejects during a game. It didn't last, so I got the suggested replacement from PBResource and that fixed it permanently. It's one of those weird things that's just hard to reproduce. Replacing the switch is the only solution.

By the way, no need to bump the thread 3 times every time you post, I and others have other things to do besides Pinside. That's all I know on the subject, hope you find what you're looking for.