WPC flipper coils, weakest to strongest, with resistances
FL-11753 small flipper, 9.8/165 ohms, usually yellow wrapper. FL-11722 weak flipper, 6.2/160 ohms, usually green. FL-11630 standard, 4.7/160 ohms, usually red. FL-15411 strong, 4.2/145 ohms, usually orange. FL-11629 strongest, used on most later WPC games, 4.0/132 ohms, usually blue. Measure from the center lug to each outer lug; the hold reading should be within 10% and the power reading within 3% of these. No WPC flipper coil should read below 3.8 ohms on the power side or 120 ohms on the hold side, or it will blow fuses and Fliptronics transistors.
Systems
Related tips
- WPC flipper coils from weakest to strongest
- Williams flipper coils from weakest to strongest
- WPC flipper coils, weakest to strongest
- Flipper coil strength order (WPC flipper coil strengths file)
- Williams 50 V fat flipper coils ranked by strength
- Fitting a parallel FL11630 or FL11722 flipper coil
- Right flipper turns weak after a few games: the coil, even though it measures fine
- Series and parallel wound flipper coils on System 11
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Two, Clay Harrell (pinrepair.com)