I'd start with removing the coil stops and cleaning them. Anytime you can remove black gunk, it will help a part move better.

Congo is really a cool game...I love mine.
Unfortunately though when I was first looking at getting my Congo, I was warned to watch for that...because it is an unobtanium part. Luckily the one I bought was in good shape and works good. I have played several that the gorilla is sluggish and just doesn't move right. Hopefully someone can repro this part eventually. I have heard of people repairing them, but I am not sure how they go about it.

Phoebe

Take that whole works apart and clean everything well

That will allow you to see where it's worn/mushroomed/dirty/gunked up

May be able to get by with just cleaning everything.

Will also give you a better look at where the problem is, and then how to fix it should be logical.

I feel a little silly mentioning this but one thing that will make it sloppy as hell is if the square part of the shaft that goes thru the square hole is rounded off, check yours out, if it's a sloppy fit you need to fix it!

Nice, that should solve your problem!
Post the results for others with the same problem in the future.

Well played hassanchop that fits like a glove!! Looks like that should pretty much solve the problem now you can get back to playing it.

They still make those?

Ahh man, sorry to hear that. Sometimes this hobby has us happy as can be and others it has us shouting "are you serious". At least the coil will most likely be a quick fix. Keep on flippin!

Are they making contact? I had to adjust all mine. They take quite a beating and can get rather bent out of shape

Yea just see how far the leafs are apart and make sure to adjust them so a light hit they would close registering a hit. Adjust the leaf switches from the bottom not the top/tip. Also this tool from pinball life is awesome for making such adjustments:

http://www.pinballlife.com/index.php?p=product&id=1518&parent=0

Leaf_Adjuster.jpg

Just looked through the manual. Checked into the switch matrix. You say only 4 targets stopped working. C still works? The C O N G O targets and the A M Y targets in the back lanes are all on the same column so you know that transistor on the board is fine. That column is run buy connector J206-7. All are on the green violet wire. Maybe check for a break on tht wire right after the C target. They should be run in a change and it looks like the C is that start of the chain

And dont give up. Congo is a great game. All pins have problems. It's half the fun

Should come from one of the connected to the mini playfield switches(comes from Amy targets before that) and goes to the C target first and then to each target in line after that. This is just going from reading the manual/schematics on my phone. Pin is at home

Should be 2 terminals on each target too. One will have this green/violet wire. The second wire will be different for all and come from different rows so shouldn't relate to all 4 going out at once. For reference C should be white/yellow. O should be white/green. N should be white/blue. G should be white/violet. Last O should be white/gray.

Glad we found it! Wish I could always figure out my own issues this easily!