Update
Updating database... Please wait.
Friday 17 November 2017 at 21:11
This is almost always caused by too much tension on the 9 position switch. The switch puts too much pressure on the wireform that moves it, and the other end of the wireform rides on the reel itself, which causes the reel to hang between 8 and 9. Cutting off springs generally is not a good solutio...
Source: http://pinside.com/pinball/forum/topic/gottlieb-em-score-reels-stick-around-9-hell#post-4078485