Okay, I was doing a search on ball return problems and found this. my Gottlieb King Kool, when credit button pushed the game resets all reels to zero but doesn't kick the ball out. I can hit the top of the right side rail (top of machine) with my fist and it will kick the ball out and plays fine until ball drains, then I have to hit machine again to get ball out to shooter lane. it does it every time ball drains. (just started doing this, was working fine). the points on the ball kicker are fine and making good contact. I can reach in the out hole and manually trigger the roll over switch and it will kick the ball out. any ideals?

Thanks Wickerman2! The problem WAS at the bonus unit.....I checked the switch points but not the contact disk lining up properly with the wipers.....sounds like you know ur stuff. Thanks Again! Jon