Shooter springs come in various strengths. Used games frequently have the wrong spring (operators will substitute what they have on hand to keep a game running).
These are interchangeable between manufacturers, but the “colors” are not consistent. This list might help.
|Williams PN||Gottlieb PN||Stern/Sega/DE PN||notes|
|.026||10-148-6 brown||A-27292||wimpy; TZ|
|.028||10-148-7 white||low; Congo, JY, SS, WD|
|.031||10-148* black||266-5001-07 blue||old WMS number for -4?|
|.033||10-148-4 green||A-348||“standard”; AF, EBD, Tommy|
|.035||10-148-1 silver||A-25877||266-5001-04 green||SPP**|
|.038||10-148-3 blue||266-5001-05 orange||Pinbot, TOTAN|
|.042||10-148-2 red||highest; BK2K|
** Simpsons Pinball Party: I got the Williams equivalent for this but I didn’t find it strong enough to make the Apu shot, so I went one spring stronger.
Bally games: all SP-200-24, which is NLA. Use equivalent 10-148-4 or A-348.
On some games (Black Knight 2000) shooter springs are important because a strong spring is required to launch the ball into play. On other games (Twilight Zone) a weak spring is required for greatest precision. On my Simpsons Pinball Party, the documented diameter wasn’t enough and I went to a stronger spring. And then there are games like WPT which are pretty open-minded and will work with whatever you find in your junk drawer.
One other important question: is the barrel spring on the outside of the cabinet the one you want? There are several, and a couple different shooter rod lengths. They don’t differ by much, but it can matter. On my Twilight Zone, I need the shorter barrel or the rod didn’t impact the ball. Gottlieb A-25878 or A-347, Williams 10-149, or Stern 266-5010-00 may be present on any given game. Not only can I not differentiate between these in my stock, but I don’t think the parts distributors necessarily can, either.
A-348 is probably the right choice for any game from before 1990.
I got most of this from Marco Specialties’ web site catalog but I did compare a few Stern manuals and two other vendors.
- Bay Area Amusements, now known as Planetary Pinball
- Marco Specialties (I like their spring kit)
- Pinball Resource Usually the right option for Gottlieb parts, and always the right option for Gottlieb part numbers.
WPT manual claims 266-5001-07 is green but lists two green springs, so I believe that’s an error. AC/DC says blue for this number.