Quoted from trilamb:
Having two issues with my Black Arrow Hobbit.
1: my plunger is inconsistent. When I first got it EVERY SINGLE FULL PLUNGE would hit the A in Dwarf. Then after a month or so it stopped doing that. Now sometimes on a full plunge there's barely enough power to hit a lock rollover and once in a blue moon it will hit the A in Dwarf. It feels like spinning the plunger rod effects this. Is there some sort of magnet or device that powers the plunger? It feels when the plunger rod is spun in certain places it "catches" and there's more power? Is it just the tip of the rod that's misshapen? I'm newish to pinball so not sure what to look for to change this, but would like my consistent plunges back.
2: The captive ball Thorin Shot gets stuck. The second ball seems to get stuck on the rails so it doesn't make full contact with the captive ball. Again, this is new and didn't do this for the first month. Should I bend the rails holding the second ball a bit so they're looser?
Check the shooter rod, it should move very freely in and out. Silicone/PTFE (teflon) spray to the rod will make it move smoother.
Check to see if your shooter rod is bent. This happens sometimes when raising or lowering the playfield.
Check the condition of the shooter rod tip, it may be time to replace it.
Check the condition of the shooter rod spring, its possible to stretch it out to make it stronger while waiting for a replacement spring.
Check the pitch or downward angle of the games playfield (not the glass) it plays the best at about 7.2 degrees.
The game should be as level as can it can be horizontally at 0 degrees pitch (left to right).
Adjust leg adjusters as neccessary.
The captive ball should move freely, check for debris in or around it. Make any adjustments neccessary.