Just got an Apollo 13 in to shop, had only played it for 2 days.
I had taken the glass off of Apollo 13 to check on a series of solenoids that had stopped firing, but with it off I noticed a burning smell and found that the Moon Magnet was incredibly hot. I had noticed the moon was really hot, but my finger glanced the magnet which was nearly as hot as a soldering iron and burnt the tip of my finger.
I unplugged the game right away.
I came back to it a few minutes later with some ice that was soothing my finger. Placing ice on the magnet, it SIZZLED. It was going from ice to boiling instantly, and that is after being off for a few minutes still.

After it was all cooled, I checked the moon magnet's fuse and it was an odd duck, seemingly showing a 6.3A SB rating, which is still way over the 4A rating in the manual.

I googled a bit and see other people have troubles with the control board and such, but I also curious: What can make a magnet core get so dangerously HOT?
And has anyone experienced a magnet giving a critically hot temp?

IMG_20150815_011103b.jpg

I will certainly replace the coil, and take a look at the control board soon. Anything else that might cause this?

*bump*

just to give this thread some closure:
I replace the magnet, the coil, the transistor on the board, and put in a 3A slowblow fuse.

Still having moon issues, see https://pinside.com/pinball/forum/topic/apollo-13-moon-issues#post-2828460
but at the very least it is not overheating.