Keep going Rob - Process of elimination.
It does not seem to be a stuck switch. I've seen similar problems before. What your need to do is take out the tens and hundreds score wheel and tighten the switch stacks with a flat head screwdriver (with the game off). Clean the contacts on each reel stack with a business card.
Start a game
Do all reels reset to zero ? all reset to zero except for 100's
Does the ball get served and no score added ? Not sure about this one as i dont let it hit anything worth 100 as it causes the sticky
Hit a tens switch - what happens ? scores 10 points
When it gets to ninety, hit another tens switch - What happens ? yep coil gets stuck as it tries to move the hundred
Hit a hundreds switch - What happens ? gets stuck
When it gets to nine hundred, hit another hunderds switch - What happens ? doesnt move the 1000's
Ok now ive introduced a new problem after tightening and cleaning the switches. Motor keeps running. While the motor is running, i hit the hundreds relay with my finger... It scores 100 points
! before when the motor wasnt running constantly, the hundreds would actually score 1000 points. I have checked the switches and when the score reel gets to 9 (100's) it tries to what seems like a double movement (2 clicks)... man im so frustrated i might go and clean my spare gulfstream playfield and leave pro football alone for a couple of years