I'm working on a neighbor's 1973 Bally Sky Kings. I've done quite a bit of work on SS machines but haven't worked much on EM's.

I've run into two issues so far that I can't get a handle on.

1 - At start up, the solenoid coil for the bonus stepper activates and sticks (photo #1).

2 - When the spinner is activated, the spinner relay coil (photo #2) sticks as does the associated solenoid coil on the spinner unit assembly. I'm assuming/guessing the relay coil is the culprit here judging by the condition of the coil wrappers.

Thanks in advance to any help you can provide.

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Probably should have informed initially that I have played with the spinner playfield switch. The coils (relay & solenoid) still stay energized.

10-4 on replacing the coils. I want to get the problems fixed before I install and fry new ones.

I have not yet serviced the bonus stepper. However, it moves freely and resets on initial startup.