What’s the deal with that upper flipper and the supper under it? It’s a terrible ball trap

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That “plug” is pretty f’ing flimsy.

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I’m getting a ball stuck there about once every 3 games.

My distributor got this from Steve Ritchie. No time for me to pursue this until the weekend.

This is a symptom of a missing washer in the stack on the flipper shaft underneath the "ironing board."

It can be fixed on most machines by adding a 1" dia. X 1/4" hole washer under the ironing board. Most games included this washer, but I guess not all.

Even without the washer, loosen the hex screw at the flipper shaft and remove all up and down play in the flipper. Re-tighten and check if ball can be stuck behind the flipper.

Regarding that ball trap under the top right flipper, Steve Ritchie had said:

This is a symptom of a missing washer in the stack on the flipper shaft underneath the "ironing board."

It can be fixed on most machines by adding a 1" dia. X 1/4" hole washer under the ironing board. Most games included this washer, but I guess not all.

Even without the washer, loosen the hex screw at the flipper shaft and remove all up and down play in the flipper. Re-tighten and check if ball can be stuck behind the flipper.

Finally got time to work on this.

When looking at the schematic, there is no washer.

On mine, there was a washer above the 1" plastic spacer and below the "plug". However, that spacer was a 0.5" outer diameter. Replacing it with a 1" washer seems too have worked. There's still a bit of play in the plug, but not enough to trap the ball.

No need to winterize your pins!

From SR himself:

This is a symptom of a missing washer in the stack on the flipper shaft underneath the "ironing board."
It can be fixed on most machines by adding a 1" dia. X 1/4" hole washer under the ironing board. Most games included this washer, but I guess not all.
Even without the washer, loosen the hex screw at the flipper shaft and remove all up and down play in the flipper. Re-tighten and check if ball can be stuck behind the flipper.

Did that with mine, totally fixed it.