SM-35-4000 Williams Pinball Coil (Coin Lockout) Replacement coils and solenoids for Williams Pinball Machines. We have a large selection of coils for early mechanical and later electronic Williams games that control flippers, jet bumpers, ball kick out holes and other systems. Be sure to replace the wires in the same position as the original coil and that the silver band on the coil diode is facing the same position as your old one. Remove and replace one wire at a time or better yet, take a picture before beginning so there will be no confusion later. If you don’t see the pinball machine coil or solenoid you need, we can special order any coil. Call for details.